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These are the user uploaded subtitles that are being translated: 1 00:00:08,060 --> 00:00:09,690 Narrator: Dynamic. 2 00:00:11,100 --> 00:00:12,760 In your face. 3 00:00:13,970 --> 00:00:16,900 And always moving forward. 4 00:00:17,590 --> 00:00:19,950 Watson: No city looks more to the future than new york city. 5 00:00:20,660 --> 00:00:23,290 Narrator: The big apple grew out of water. 6 00:00:25,290 --> 00:00:29,060 The secret story of its success lies hidden under its two rivers... 7 00:00:30,070 --> 00:00:32,300 And its mighty harbor... 8 00:00:35,620 --> 00:00:38,920 Delgado: This is one of the most notorious stretches of water on 9 00:00:38,960 --> 00:00:40,890 The new york waterfront. 10 00:00:43,460 --> 00:00:46,100 Narrator: Imagine if we could empty the oceans. 11 00:00:48,030 --> 00:00:50,450 Letting the water drain away... 12 00:00:51,020 --> 00:00:53,750 To reveal the secrets of the sea floor. 13 00:00:54,660 --> 00:00:57,120 Now we can. 14 00:00:57,660 --> 00:01:01,230 Using accurate data and astonishing technology 15 00:01:03,970 --> 00:01:08,090 To bring light once again to a lost world. 16 00:01:14,060 --> 00:01:18,830 How does the horror of 911 lead to an extraordinary discovery 17 00:01:18,860 --> 00:01:21,530 From the birth of america? 18 00:01:21,800 --> 00:01:25,120 Watson: The most grizzly and bloodiest event of the entire revolutionary war. 19 00:01:26,520 --> 00:01:28,560 Narrator: What does this off-shore wreck 20 00:01:28,590 --> 00:01:31,390 Reveal about the city's explosive growth? 21 00:01:32,090 --> 00:01:34,430 Jaffe: People talked about a forest of masts. 22 00:01:35,860 --> 00:01:38,800 Narrator: And what sank this huge us warship, 23 00:01:39,330 --> 00:01:41,690 Just miles from new york? 24 00:01:44,190 --> 00:01:49,860 (theme music plays). 25 00:02:01,420 --> 00:02:03,960 The largest city in america... 26 00:02:05,430 --> 00:02:08,200 300 square miles. 27 00:02:09,970 --> 00:02:12,630 Eight and a half million people. 28 00:02:16,820 --> 00:02:18,660 Tenacious. 29 00:02:18,690 --> 00:02:20,260 Powerful. 30 00:02:20,290 --> 00:02:22,460 Confident. 31 00:02:24,230 --> 00:02:26,700 All of it built from scratch... 32 00:02:26,930 --> 00:02:29,970 In just 400 years. 33 00:02:30,490 --> 00:02:33,350 And the secret to its success: 34 00:02:33,590 --> 00:02:36,420 Its rivers and harbor. 35 00:02:37,090 --> 00:02:39,490 In the waters around new york, 36 00:02:39,530 --> 00:02:42,560 Archaeologists have located thousands of wrecks. 37 00:02:43,870 --> 00:02:45,230 Time capsules... 38 00:02:45,570 --> 00:02:48,950 That can reveal this city's incredible story in a new light. 39 00:02:51,390 --> 00:02:53,760 One in particular... 40 00:02:54,930 --> 00:02:57,890 What is this strange wreck? 41 00:02:57,930 --> 00:03:00,200 And why is it here? 42 00:03:07,620 --> 00:03:09,320 (explosion) 43 00:03:14,460 --> 00:03:16,560 (screams) 44 00:03:17,830 --> 00:03:21,820 (siren and horn) 45 00:03:25,920 --> 00:03:29,460 As new yorkers recover from the shock of 9/11. 46 00:03:30,260 --> 00:03:33,530 The ruins of the twin towers reveal a secret... 47 00:03:33,970 --> 00:03:37,150 From the very start of their city's story. 48 00:03:37,720 --> 00:03:40,250 Riess: Little did we know that from this terrible tragedy, 49 00:03:40,290 --> 00:03:42,620 There would be a major discovery. 50 00:03:44,230 --> 00:03:46,290 A secret from the past. 51 00:03:48,030 --> 00:03:52,430 Narrator: By 2010 1.8 million tons of debris have been removed. 52 00:03:55,590 --> 00:03:58,660 The construction of a high-security parking garage is underway. 53 00:04:00,790 --> 00:04:03,290 Riess: They decided to make that entrance underground, 54 00:04:03,330 --> 00:04:05,530 So they dug down deeper than they had before. 55 00:04:07,070 --> 00:04:09,370 Narrator: 22 feet beneath the tarmac. 56 00:04:12,390 --> 00:04:14,790 In the shadow of the twin towers... 57 00:04:15,420 --> 00:04:17,960 The remnants of an ancient ship. 58 00:04:20,600 --> 00:04:22,730 Reporter (over tv): At the construction site at ground zero, 59 00:04:22,760 --> 00:04:24,360 A rare find. 60 00:04:24,400 --> 00:04:26,980 What we can see is believed to be half of a ship. 61 00:04:31,020 --> 00:04:32,860 Narrator: Construction halts. 62 00:04:32,890 --> 00:04:36,490 And a team of archaeologists rush to ground zero. 63 00:04:37,530 --> 00:04:40,630 The principle investigator: Warren riess. 64 00:04:42,170 --> 00:04:43,750 Riess: It was right there. 65 00:04:43,790 --> 00:04:47,250 Right where the security area is for parking at the world trade center. 66 00:04:48,890 --> 00:04:51,620 Narrator: When warren arrives only part of the ship is exposed. 67 00:04:52,890 --> 00:04:56,060 Its secrets still hidden under the mud. 68 00:04:56,400 --> 00:05:01,080 Riess: The history of this particular vessel might fill in tremendous gaps in our 69 00:05:02,320 --> 00:05:04,890 Knowledge about the history of new york city itself. 70 00:05:06,530 --> 00:05:10,830 Narrator: To find out more, warren's team scan the excavated site with 71 00:05:10,860 --> 00:05:12,930 High-accuracy laser technology. 72 00:05:15,130 --> 00:05:17,580 Combining the high-resolution 3-d data, 73 00:05:18,120 --> 00:05:20,220 With cutting-edge computer-imaging... 74 00:05:20,920 --> 00:05:24,660 We can turn back time and drain ground zero... 75 00:05:36,220 --> 00:05:40,660 To reveal an astonishing subterranean secret. 76 00:05:44,930 --> 00:05:48,770 Layers of earth crumble away. 77 00:05:52,750 --> 00:05:56,620 22 feet underground, in the heart of manhattan... 78 00:05:59,030 --> 00:06:02,030 The flattened wreck of a wooden ship. 79 00:06:06,700 --> 00:06:11,120 It's 30-foot-long and its wooden structure is roughly-hewn. 80 00:06:12,890 --> 00:06:15,560 Riess: We'd never seen a vessel just like this one. 81 00:06:16,460 --> 00:06:19,260 It was not only rare it's one of a kind. 82 00:06:20,130 --> 00:06:22,070 Narrator: What is this ship? 83 00:06:22,100 --> 00:06:25,050 And what's it doing beneath the heart of manhattan? 84 00:06:25,420 --> 00:06:29,260 More than 500 yards from the shoreline. 85 00:06:29,860 --> 00:06:34,390 To find out, riess and his team need to learn its age. 86 00:06:37,870 --> 00:06:43,020 Taking a closer look inside the wood they find well preserved tree rings. 87 00:06:47,030 --> 00:06:51,660 They reveal that the timber was felled in 1773 or soon after. 88 00:06:54,870 --> 00:06:57,650 Riess: It was like a time capsule, a secret time capsule. 89 00:06:59,450 --> 00:07:03,960 Narrator: In america the 1770s mean only one thing... 90 00:07:04,490 --> 00:07:06,160 Revolution. 91 00:07:06,190 --> 00:07:08,290 Riess: What we have is a, 92 00:07:08,330 --> 00:07:10,500 A vessel that's been hiding underneath new york city 93 00:07:10,530 --> 00:07:12,730 That's from the revolutionary period. 94 00:07:13,300 --> 00:07:17,820 Narrator: Back then, new york is home to just 25,000 people. 95 00:07:17,860 --> 00:07:21,690 But the quality of its harbor has already made it one of america's 96 00:07:21,730 --> 00:07:24,290 Most successful ports. 97 00:07:25,000 --> 00:07:29,000 Its strategic importance puts new york firmly in the cross hairs of 98 00:07:29,030 --> 00:07:31,620 Britain's king george... 99 00:07:33,160 --> 00:07:37,420 When the american revolution begins in 1775. 100 00:07:38,960 --> 00:07:43,760 Just a year later a huge british invasion force drives george washington's 101 00:07:43,800 --> 00:07:45,700 Army out of the city. 102 00:07:47,290 --> 00:07:50,720 (gunfire) 103 00:07:51,110 --> 00:07:54,790 Could this ship have been part of the battle? 104 00:07:58,130 --> 00:08:02,200 Going back to the drained wreckage, clues emerge... 105 00:08:04,070 --> 00:08:09,460 Beneath the decking, 327 pieces of artillery. 106 00:08:10,590 --> 00:08:14,560 Including a cannonball and 56 musket balls. 107 00:08:18,070 --> 00:08:23,290 Soldiers from one side or another have clearly been on board this ship. 108 00:08:26,160 --> 00:08:28,290 Then, in the center of the wreck, 109 00:08:28,330 --> 00:08:32,400 Warren riess's team discover the smallest of clues. 110 00:08:36,370 --> 00:08:38,120 Riess: This button was found, 111 00:08:38,150 --> 00:08:40,320 In the midships area on the vessel, 112 00:08:40,360 --> 00:08:43,120 Between some frames and some planks and 113 00:08:43,160 --> 00:08:47,030 Because of that we know it was on the ship before it was buried. 114 00:08:49,160 --> 00:08:52,830 Narrator: The pewter button is stamped with the number fifty-two. 115 00:08:53,170 --> 00:08:56,890 It's fallen from the uniform of a soldier from the fifty second regiment 116 00:08:56,920 --> 00:08:58,720 Of the british army. 117 00:08:59,260 --> 00:09:02,390 Riess: They were grenadiers which means they were very aggressive assault troops. 118 00:09:04,400 --> 00:09:09,630 Pretty exciting to find this because this ties the ship to a british soldier, 119 00:09:10,990 --> 00:09:13,520 In new york during the revolution. 120 00:09:13,560 --> 00:09:16,190 A common soldier who's lost their button. 121 00:09:18,030 --> 00:09:21,290 Narrator: If this ship was used by some of the most fearsome troops in 122 00:09:21,330 --> 00:09:24,730 The british army, what were they using it for? 123 00:09:27,390 --> 00:09:31,220 Combining the scanning data with new research by texas a&m university, 124 00:09:33,860 --> 00:09:35,890 We can resurrect the ship. 125 00:09:39,560 --> 00:09:44,580 As her original form rises from the dirt, her full size becomes clear 126 00:09:46,020 --> 00:09:48,520 And her striking features. 127 00:09:49,760 --> 00:09:51,520 50-feet-long... 128 00:09:51,560 --> 00:09:53,940 Her beam, eighteen feet. 129 00:09:54,160 --> 00:09:56,760 With the hull of a river craft. 130 00:09:57,030 --> 00:10:00,570 Just four feet deep and a small keel. 131 00:10:01,420 --> 00:10:04,520 This is not an ocean-going vessel... 132 00:10:05,260 --> 00:10:08,960 It's specifically designed for use in sheltered coastal waters. 133 00:10:11,300 --> 00:10:13,700 Riess: It was able to get into shallow water, 134 00:10:14,430 --> 00:10:17,100 Into little coves, up alongside ships. 135 00:10:21,260 --> 00:10:25,020 Narrator: A ship that's perfect for operating within new york harbor, 136 00:10:25,290 --> 00:10:27,960 And crewed by british grenadiers. 137 00:10:28,000 --> 00:10:32,070 Evidence that she could be part of a little known but brutal story. 138 00:10:35,550 --> 00:10:39,460 During the war british forces ferried many thousands of americans... 139 00:10:39,820 --> 00:10:42,090 To a horrifying destination. 140 00:10:42,490 --> 00:10:44,260 Just two miles away... 141 00:10:44,300 --> 00:10:46,730 Off the shores of brooklyn. 142 00:10:47,530 --> 00:10:49,100 Riess: During the american revolution. 143 00:10:49,130 --> 00:10:54,490 This was known as wallabout bay and it was the most lethal place during 144 00:10:55,460 --> 00:10:57,690 The whole revolution for the americans. 145 00:11:00,160 --> 00:11:03,300 Watson: New york city still has its secrets, its dark past. 146 00:11:04,500 --> 00:11:06,630 Including the most grisly and bloody, 147 00:11:06,670 --> 00:11:09,590 Bloodiest event of the entire revolutionary war. 148 00:11:11,590 --> 00:11:14,220 Narrator: As the british try to quell the uprising, 149 00:11:14,260 --> 00:11:17,060 They capture thousands of prisoners and ferry them 150 00:11:17,100 --> 00:11:23,500 Out onto the waters of wallabout bay to a place known as 'hell afloat'. 151 00:11:27,660 --> 00:11:30,760 A flotilla of festering british ships. 152 00:11:30,990 --> 00:11:36,380 Overcrowded, freezing cold, poorly supplied and run by brutal guards. 153 00:11:39,000 --> 00:11:42,290 Watson: The diseases that swept through just terrorized the men on board. 154 00:11:44,290 --> 00:11:48,460 Narrator: Most notorious of all, the hms jersey. 155 00:11:49,990 --> 00:11:54,400 Watson: She would serve as potentially the worst prison ship, floating dungeon, 156 00:11:55,170 --> 00:11:57,550 In human history. 157 00:11:57,920 --> 00:12:01,250 Narrator: Warren riess believes that the world trade center ship may 158 00:12:01,290 --> 00:12:05,220 Play a role in this dark chapter of new york's history. 159 00:12:07,360 --> 00:12:11,060 Riess: They needed boats to go back and forth and to bring prisoners out and 160 00:12:11,100 --> 00:12:13,800 This would have been a perfect vessel for that. 161 00:12:14,620 --> 00:12:17,720 They would have just stuffed them in there even if they had to pack them in, 162 00:12:18,090 --> 00:12:20,020 Sitting down. 163 00:12:20,060 --> 00:12:22,830 It might carry 100 people on board. 164 00:12:25,760 --> 00:12:28,300 Narrator: The casualty figures are staggering. 165 00:12:29,330 --> 00:12:32,050 Far worse than 9/11. 166 00:12:33,290 --> 00:12:38,990 Historians estimate that 11,000 men die on hms jersey alone... 167 00:12:40,400 --> 00:12:45,330 Watson: Twice as many men died aboard the jersey as were lost in combat during 168 00:12:45,730 --> 00:12:49,150 The entirety of the revolutionary war. 169 00:12:49,420 --> 00:12:51,550 It's unimaginable. 170 00:12:54,090 --> 00:12:56,660 Riess: It was a very dark chapter of american history. 171 00:13:04,720 --> 00:13:08,150 Narrator: One last mystery remains about the british ferryboat. 172 00:13:09,390 --> 00:13:13,430 Why was it found under the heart of manhattan? 173 00:13:29,560 --> 00:13:32,630 Narrator: America finally wins independence. 174 00:13:33,830 --> 00:13:36,200 And new york changes fast. 175 00:13:39,990 --> 00:13:42,360 Jaffe: In the years after the american revolution, 176 00:13:42,390 --> 00:13:44,990 New york very much uh is like a phoenix 177 00:13:45,030 --> 00:13:48,260 Rising from the ashes politically and economically. 178 00:13:49,160 --> 00:13:52,230 Narrator: At its heart, a thriving dock... 179 00:13:52,600 --> 00:13:56,420 That looks very different to the city of today. 180 00:13:57,390 --> 00:13:59,390 Riess: We're in the middle of a modern city here, 181 00:13:59,420 --> 00:14:02,260 In the lower districts of manhattan and about 182 00:14:02,290 --> 00:14:05,080 Halfway down that block was the original shoreline. 183 00:14:06,730 --> 00:14:10,950 Narrator: Eager to improve their harbor new yorkers build new wharves. 184 00:14:12,050 --> 00:14:15,150 Extending the island of manhattan out into the bay... 185 00:14:16,460 --> 00:14:18,420 Abandoned in the docks, 186 00:14:18,460 --> 00:14:20,490 Half sunk in the mud, 187 00:14:20,530 --> 00:14:24,100 The old british ferry is simply built around and over. 188 00:14:28,150 --> 00:14:29,590 Centuries later, 189 00:14:29,650 --> 00:14:34,560 The world trade center rises on top of the old dockland and the ships 190 00:14:35,060 --> 00:14:37,880 That had witnessed america's bloody birth. 191 00:14:40,530 --> 00:14:45,350 Commerce drives the city's expansion and for commerce, location is everything. 192 00:14:48,660 --> 00:14:50,720 Facing the roaring atlantic, 193 00:14:50,760 --> 00:14:53,060 At the mouth of the hudson river, 194 00:14:54,060 --> 00:14:56,130 New york's huge natural harbor 195 00:14:56,160 --> 00:14:58,900 Is the perfect place for an international port. 196 00:15:01,690 --> 00:15:04,350 Miles of shoreline in a protected bay. 197 00:15:05,190 --> 00:15:08,720 From which an independent america can trade with the world. 198 00:15:10,190 --> 00:15:11,790 In the 1800s, 199 00:15:11,830 --> 00:15:15,700 More passengers and cargo flow through new york than all other 200 00:15:15,730 --> 00:15:17,780 Us ports combined. 201 00:15:18,650 --> 00:15:22,560 Jaffe: There were so many sailing vessels, coming and going and docking here, 202 00:15:23,160 --> 00:15:26,530 That observers would describe it as a forest of masts. 203 00:15:29,860 --> 00:15:33,100 Narrator: But the city's ambition soon outgrows the fabulous 204 00:15:33,130 --> 00:15:35,620 Harbor provided by nature. 205 00:15:37,420 --> 00:15:39,920 Just yards from bustling uptown manhattan... 206 00:15:44,560 --> 00:15:48,730 Evidence of an earth-shattering event that reshaped this city. 207 00:15:51,820 --> 00:15:57,390 Just how far would new yorkers go to make their port the greatest on earth? 208 00:16:05,770 --> 00:16:09,320 New york harbor's main entrance is the verrazano narrows. 209 00:16:14,790 --> 00:16:17,230 But there's a second gateway to the atlantic... 210 00:16:18,030 --> 00:16:20,330 Long island sound. 211 00:16:22,830 --> 00:16:26,050 Crucial to sustaining the frenzied flow of commerce. 212 00:16:29,360 --> 00:16:32,930 But it's obstructed by a perilous stretch of the east river. 213 00:16:35,860 --> 00:16:38,000 Hell gate. 214 00:16:38,700 --> 00:16:42,420 In the 1850s, one in fifty ships are devoured here. 215 00:16:43,550 --> 00:16:45,350 A terrifying statistic. 216 00:16:48,990 --> 00:16:50,760 James delgado, 217 00:16:50,800 --> 00:16:55,400 Maritime archaeologist from search incorporated, wants to learn more about the 218 00:16:55,430 --> 00:16:57,200 Dangers of hell gate. 219 00:16:59,320 --> 00:17:01,050 Delgado: This early map is particularly 220 00:17:01,090 --> 00:17:03,590 Remarkable because it shows us hell gate... 221 00:17:05,160 --> 00:17:07,560 With the positions of a number of rocks marked. 222 00:17:10,630 --> 00:17:14,170 Narrator: Islands and hidden reefs choke the shipping lane. 223 00:17:15,520 --> 00:17:18,090 Churning the water into a maelstrom. 224 00:17:19,760 --> 00:17:21,690 Delgado: This is a challenging, if not dangerous, 225 00:17:21,730 --> 00:17:23,590 Area to navigate... 226 00:17:24,360 --> 00:17:26,400 A gauntlet to be run. 227 00:17:27,870 --> 00:17:30,700 Narrator: Among the many perils of hell gate, 228 00:17:30,740 --> 00:17:33,150 One monster looms large and deadly... 229 00:17:34,990 --> 00:17:36,760 Flood rock. 230 00:17:39,260 --> 00:17:43,460 Nine acres of stone lurking just beneath the surface. 231 00:17:46,330 --> 00:17:48,820 Right at the heart of hell gate. 232 00:17:55,490 --> 00:17:58,390 Today, the channel is still dangerous... 233 00:18:00,870 --> 00:18:02,870 Delgado: The major obstacle was basically right 234 00:18:02,900 --> 00:18:04,880 In the middle of the road, right off of here. 235 00:18:06,520 --> 00:18:10,590 Narrator: But there's no sign of flood rock above the water. 236 00:18:11,830 --> 00:18:16,130 Does the ship-devouring monster lie beneath the surface? 237 00:18:19,200 --> 00:18:22,120 James takes to the water. 238 00:18:23,960 --> 00:18:26,120 Man (over radio): Alright, sounds good. 239 00:18:32,260 --> 00:18:35,360 Delgado: This is one of the most notorious stretches of water on 240 00:18:35,420 --> 00:18:37,530 The new york waterfront. 241 00:18:42,060 --> 00:18:45,590 What you would have been faced with is all this fast-moving water, 242 00:18:45,630 --> 00:18:46,990 And it's not just 243 00:18:47,030 --> 00:18:48,760 Moving in one direction it's going back and forth, 244 00:18:48,800 --> 00:18:51,030 It's swirling around rocks. 245 00:18:51,700 --> 00:18:54,850 You'd sail through, you lose the wind and suddenly that movement of 246 00:18:54,890 --> 00:18:57,850 Water drags you right into the teeth. 247 00:18:58,590 --> 00:19:01,720 Narrator: In search of flood rock, the team from noaa scans 248 00:19:01,760 --> 00:19:05,130 Hell gate with multi-beam sonar... 249 00:19:05,460 --> 00:19:08,000 Firing sound waves into the murky depths... 250 00:19:09,200 --> 00:19:12,180 The return signal records the shape of the features beneath. 251 00:19:14,190 --> 00:19:17,620 Man: This is a real time image of the bottom. You can see all the rubble. 252 00:19:18,390 --> 00:19:20,510 Delgado: Wow. 253 00:19:20,830 --> 00:19:23,760 Narrator: Using the 3-d multi-beam data and the latest 254 00:19:23,800 --> 00:19:26,470 Computer visualization technology... 255 00:19:26,770 --> 00:19:30,550 It's now possible to pull the plug on the entire harbor. 256 00:19:33,220 --> 00:19:36,790 To reveal a jaw-dropping sight... 257 00:19:41,270 --> 00:19:44,200 Icons of the city, as never seen before... 258 00:19:51,860 --> 00:19:54,760 As the water recedes from the east river, 259 00:19:54,800 --> 00:19:57,630 The remains of flood rock should come into view... 260 00:20:01,240 --> 00:20:05,150 But there's not a trace of the beast that is shown in the old charts. 261 00:20:08,690 --> 00:20:12,030 Nine acres of rock have vanished. 262 00:20:14,930 --> 00:20:16,930 How? 263 00:20:20,590 --> 00:20:23,260 Buried in the archives... 264 00:20:23,590 --> 00:20:27,890 An incredible story of new york self-confidence and ambition. 265 00:20:30,870 --> 00:20:33,830 Delgado: This 1848 chart by the us coast survey is actually a working 266 00:20:34,340 --> 00:20:36,550 Document it was never published. 267 00:20:36,590 --> 00:20:39,720 This is for an engineer to figure out how best to start dealing with this. 268 00:20:40,890 --> 00:20:44,230 How do we pull these teeth to make this a smoother ride through? 269 00:20:46,260 --> 00:20:48,700 Narrator: Backed by wealthy new york merchants, 270 00:20:48,730 --> 00:20:51,630 The city fathers make a decision. 271 00:20:51,920 --> 00:20:54,720 The future of the city is at stake. 272 00:20:54,720 --> 00:20:57,390 Flood rock has got to go. 273 00:20:58,330 --> 00:21:02,730 Delgado: It is the beginning of an age in which nothing was deemed impossible, 274 00:21:03,530 --> 00:21:05,630 If enough ingenuity, 275 00:21:05,670 --> 00:21:10,620 Engineering and perhaps money was put behind it as human beings worked to 276 00:21:11,020 --> 00:21:13,460 Reshape the planet to their purposes. 277 00:21:14,960 --> 00:21:18,790 Narrator: James discovers how the city's engineers planned to do it. 278 00:21:20,230 --> 00:21:22,160 By attacking the problem.... 279 00:21:22,200 --> 00:21:23,970 From beneath. 280 00:21:25,750 --> 00:21:29,420 First, they sink a 70-foot shaft into the heart of the island. 281 00:21:31,580 --> 00:21:33,930 Over nine long years, 282 00:21:33,960 --> 00:21:36,430 Miners dig four miles of tunnels... 283 00:21:37,830 --> 00:21:43,870 And drill 15,000 bore-holes and in them they place a staggering 284 00:21:43,900 --> 00:21:47,560 150 tons of explosives. 285 00:21:50,260 --> 00:21:54,330 Delgado: The hell gate work is an epic moment in the history of civil engineering... 286 00:21:55,870 --> 00:22:00,220 This is a moment in which technology will triumph over nature. 287 00:22:08,700 --> 00:22:13,400 Flock to 288 00:22:13,430 --> 00:22:16,220 New york's east river. 289 00:22:16,250 --> 00:22:18,920 Delgado: Everybody is waiting for the big show. 290 00:22:19,460 --> 00:22:21,790 Narrator: Flood rock is primed with explosives... 291 00:22:23,760 --> 00:22:26,300 And the detonator is pushed. 292 00:22:27,000 --> 00:22:30,600 (explosions) 293 00:22:33,090 --> 00:22:38,720 Seven million cubic feet of pulverized rock flies up into the skies over new york city. 294 00:22:41,160 --> 00:22:43,830 Delgado: The greatest explosion, not only that new york has seen, 295 00:22:43,860 --> 00:22:46,570 But that the world has seen up to that time. 296 00:22:49,320 --> 00:22:51,420 Narrator: And when the spray clears, 297 00:22:51,460 --> 00:22:54,220 Flood rock is history. 298 00:22:56,890 --> 00:23:00,100 Leaving the riverbed looking like a gravel pit. 299 00:23:01,930 --> 00:23:06,120 Jaffe: If you really wanna think about how new yorkers have reconfigured and 300 00:23:06,550 --> 00:23:10,260 Reshaped their entire environment both on land and 301 00:23:10,290 --> 00:23:13,590 In water I think the word chutzpah is perfect for that. 302 00:23:17,430 --> 00:23:20,100 Narrator: With its second entrance now secure, 303 00:23:20,130 --> 00:23:22,420 New york's shipping business increases at an 304 00:23:22,450 --> 00:23:24,420 Ever-faster rate. 305 00:23:26,290 --> 00:23:28,490 Cargo ships move sugar, 306 00:23:28,530 --> 00:23:32,360 Spices, cotton, machinery and construction materials... 307 00:23:36,600 --> 00:23:39,550 All to feed america's booming economy. 308 00:23:43,390 --> 00:23:46,460 Delgado: New york expands dramatically in the 19th century... 309 00:23:47,660 --> 00:23:50,400 It's becoming the industrial and commercial heart of the united states. 310 00:23:52,570 --> 00:23:56,990 Narrator: By the 1880s the city's population is more than a million. 311 00:23:58,320 --> 00:24:01,160 And its waters are getting crowded... 312 00:24:01,730 --> 00:24:03,330 Dangerously so. 313 00:24:04,360 --> 00:24:08,200 In the wild atlantic, just a few miles beyond new york harbor... 314 00:24:08,970 --> 00:24:14,100 What can one strange offshore wreck tell us of the pace of trade through 315 00:24:14,140 --> 00:24:16,590 The waters of new york? 316 00:24:17,660 --> 00:24:21,090 And the peril facing those pursuing the american dream. 317 00:24:25,370 --> 00:24:28,650 Before daybreak, on March the 14th, 1886... 318 00:24:29,850 --> 00:24:34,490 The ss oregon is nearing the end of a 3,000-mile voyage from England. 319 00:24:36,690 --> 00:24:41,460 Transporting her cargo and over 600 passengers through the dark approach to 320 00:24:41,500 --> 00:24:43,630 New york harbor. 321 00:24:45,750 --> 00:24:47,950 It's a calm night. 322 00:24:48,260 --> 00:24:52,190 Just 60 miles stand between her and her final destination. 323 00:24:56,160 --> 00:24:58,130 But at first light, 324 00:24:58,170 --> 00:25:01,920 A look-out from fire island signal station reports her masts 325 00:25:01,950 --> 00:25:04,250 Drifting off course. 326 00:25:07,390 --> 00:25:11,730 Moments later the oregon disappears. 327 00:25:14,930 --> 00:25:18,200 And never arrives in new york. 328 00:25:18,650 --> 00:25:22,490 What happens to her and all the people onboard, 329 00:25:23,860 --> 00:25:25,860 Out in the darkness? 330 00:25:32,700 --> 00:25:35,920 Delgado: As flat as this seems, this is a dangerous section of ocean. 331 00:25:38,520 --> 00:25:43,490 There are many disasters that happen within the reach of this light's beams but every 332 00:25:43,890 --> 00:25:45,330 Once in a while, 333 00:25:45,360 --> 00:25:48,310 There comes a big disaster in which a large ship is lost. 334 00:25:51,690 --> 00:25:54,390 Narrator: For over 130 years, 335 00:25:54,420 --> 00:25:57,720 Oregon has lain shrouded by the atlantic. 336 00:26:00,260 --> 00:26:02,860 Delgado: The waters off the new york coast are dark, 337 00:26:02,900 --> 00:26:05,230 Cold and often murky. 338 00:26:05,270 --> 00:26:08,950 Narrator: The ocean has concealed her secrets. 339 00:26:09,520 --> 00:26:11,550 But now that's changing. 340 00:26:14,890 --> 00:26:17,260 Off the southern shore of fire island, 341 00:26:17,290 --> 00:26:20,200 The ferdinand r. Hassler goes in search of wreckage. 342 00:26:21,800 --> 00:26:24,670 Kidd: You are clear to turn around and make another pass. 343 00:26:25,120 --> 00:26:29,720 Narrator: For hundreds of years the national oceanic and atmospheric administration's 344 00:26:29,760 --> 00:26:33,390 Coast survey has been charting and re-charting these waters. 345 00:26:34,660 --> 00:26:38,100 Kidd: We're about 12 nautical miles south of fire island and we're 346 00:26:38,130 --> 00:26:40,600 About to go right on top of her now. 347 00:26:40,830 --> 00:26:45,420 Narrator: Multi-beam scanners in the ship's hull emit sonar pulses. 348 00:26:45,960 --> 00:26:49,320 Kidd: We use this technology to very accurately and precisely 349 00:26:49,360 --> 00:26:51,730 Map features on the ocean floor. 350 00:26:53,400 --> 00:26:56,030 Oh, wow there it is! 351 00:26:56,970 --> 00:26:58,730 Look at that, that's awesome! 352 00:27:01,290 --> 00:27:04,620 Narrator: Based upon this detailed three-dimensional data, 353 00:27:04,660 --> 00:27:06,220 We can bring the oregon, 354 00:27:06,260 --> 00:27:09,430 And her story, back into the light.... 355 00:27:18,260 --> 00:27:21,960 First, a towering structure of tangled metal. 356 00:27:27,970 --> 00:27:30,170 The water receding further... 357 00:27:32,450 --> 00:27:35,990 The oregon as never seen before. 358 00:27:38,760 --> 00:27:41,190 She's taken a beating from the ocean; 359 00:27:41,230 --> 00:27:45,000 Her insides are exposed to the elements allowing us to 360 00:27:45,030 --> 00:27:47,430 Examine what type of ship she is. 361 00:27:49,150 --> 00:27:51,850 Though her masts were seen from ashore, 362 00:27:51,890 --> 00:27:54,460 They must have been supplementary. 363 00:27:55,190 --> 00:27:57,430 Oregon isn't a sail ship. 364 00:27:57,460 --> 00:28:01,030 In fact, she represents a revolution in shipping. 365 00:28:02,070 --> 00:28:04,830 She is a steamer. 366 00:28:05,820 --> 00:28:08,650 Beneath her four-story high steam engine, 367 00:28:08,690 --> 00:28:11,090 The remains of nine boilers... 368 00:28:11,130 --> 00:28:13,490 Each 16-feet wide. 369 00:28:14,330 --> 00:28:16,090 Delgado: This thing is a behemoth. 370 00:28:16,130 --> 00:28:18,400 With so many fires going, 371 00:28:18,430 --> 00:28:21,600 That it's consuming massive amounts of coal. 372 00:28:23,520 --> 00:28:25,120 Narrator: And towards her stern, 373 00:28:25,160 --> 00:28:28,590 A huge screw propeller, 24 feet wide. 374 00:28:32,000 --> 00:28:34,630 This is the corpse of an athlete... 375 00:28:35,470 --> 00:28:38,370 A ship built with one thing in mind... 376 00:28:39,550 --> 00:28:41,590 Speed. 377 00:28:41,820 --> 00:28:43,860 But why? 378 00:28:46,090 --> 00:28:50,130 The answer is part of the dna of new york city itself... 379 00:28:52,200 --> 00:28:53,800 Immigrants. 380 00:28:55,750 --> 00:28:58,250 Watson: Folks from all around the world came for opportunity and for 381 00:28:58,290 --> 00:29:01,190 This dream that new york city was. 382 00:29:01,790 --> 00:29:05,330 Narrator: More than 70% of immigrants bound for america arrive 383 00:29:05,360 --> 00:29:06,960 In new york. 384 00:29:07,530 --> 00:29:11,600 Jaffe: New york is the gateway, as lincoln said, it was the front door. 385 00:29:13,120 --> 00:29:18,290 Narrator: By the late 1800s 650,000 immigrants arrive, 386 00:29:18,330 --> 00:29:21,790 Every year and up to 20,000 boats a year 387 00:29:21,830 --> 00:29:24,130 Maneuver through the harbor, 388 00:29:24,160 --> 00:29:26,700 And everyone is in a hurry. 389 00:29:27,370 --> 00:29:29,620 Delgado: It's a time of rampant capitalism. 390 00:29:29,650 --> 00:29:31,920 Great fortunes are being made. 391 00:29:31,960 --> 00:29:34,060 Profit is everything! 392 00:29:35,330 --> 00:29:37,890 Jaffe: The waters are just alive with vessels. 393 00:29:40,230 --> 00:29:43,630 Narrator: Faster ships mean more trade and bigger profits. 394 00:29:46,050 --> 00:29:48,190 Time is money. 395 00:29:55,460 --> 00:29:59,230 The quest for profit leads to an extraordinary technological race to 396 00:29:59,270 --> 00:30:02,680 Build ships that will cross the atlantic faster and faster. 397 00:30:08,460 --> 00:30:11,560 Delgado: The early days of ocean steam are cut-throat. 398 00:30:12,100 --> 00:30:14,960 You have entrepreneurs who are battling it out on the ocean. 399 00:30:18,200 --> 00:30:20,890 By the 1870s and into the 1880s, 400 00:30:21,390 --> 00:30:23,990 That's when you begin to see the birth of truly 401 00:30:24,020 --> 00:30:26,190 Magnificent ocean steamers. 402 00:30:26,230 --> 00:30:27,690 Greyhounds of the sea. 403 00:30:27,730 --> 00:30:29,790 Leviathans. 404 00:30:31,200 --> 00:30:33,600 Narrator: The british-operated 'guion line' 405 00:30:33,630 --> 00:30:37,920 Builds the oregon in 1881 to boost its new york express service. 406 00:30:41,020 --> 00:30:42,720 And she's cutting-edge. 407 00:30:44,630 --> 00:30:47,460 Delgado: It has the largest steam engine yet put into one of these ships. 408 00:30:49,500 --> 00:30:52,650 Narrator: Consuming over 200 tons of coal a day, 409 00:30:53,120 --> 00:30:56,920 Her boilers generate upwards of 12,000 horsepower... 410 00:30:57,760 --> 00:31:02,090 Driving the huge screw propeller that thrusts oregon forward at an 411 00:31:02,130 --> 00:31:04,200 Astonishing eighteen knots. 412 00:31:05,830 --> 00:31:10,620 In April 1884 she crosses the atlantic in under 6 and a half days. 413 00:31:11,690 --> 00:31:14,420 Slashing 13 hours off the record. 414 00:31:15,130 --> 00:31:17,690 Delgado: It's something that nobody had thought could be done. 415 00:31:20,900 --> 00:31:25,350 Narrator: Oregon claims the prize and earns the nickname greyhound of the atlantic. 416 00:31:30,120 --> 00:31:33,860 So, what took down such a powerful machine? 417 00:31:36,430 --> 00:31:39,430 Returning to the drained wreck there's a clue. 418 00:31:39,700 --> 00:31:42,720 Disguised by decades of decay. 419 00:31:45,290 --> 00:31:49,560 On her port side a section of the hull is more crumpled than anywhere else. 420 00:31:55,530 --> 00:31:58,500 Something must have ripped a hole right here. 421 00:32:02,420 --> 00:32:04,490 But what? 422 00:32:04,790 --> 00:32:08,330 The degradation means it's impossible to tell from the wreckage alone. 423 00:32:13,030 --> 00:32:16,120 An article from the new york times holds the answer. 424 00:32:20,360 --> 00:32:24,360 Oregon is a victim of new york's heaving waterways. 425 00:32:27,400 --> 00:32:31,570 Jaffe: The risk of getting into a collision is actually shockingly high. 426 00:32:35,560 --> 00:32:38,920 Narrator: Combining this research with the evidence from the drained wreck, 427 00:32:38,960 --> 00:32:42,190 We can piece together the final moments. 428 00:32:45,430 --> 00:32:48,920 At 4:30 in the morning oregon is bound for new york. 429 00:32:49,450 --> 00:32:51,850 Under a full head of steam. 430 00:32:52,120 --> 00:32:53,790 Delgado: It's a dark night, 431 00:32:53,820 --> 00:32:56,090 They're lining up and heading towards the port. 432 00:32:56,130 --> 00:33:00,000 They can see the lights along the long island shore, 433 00:33:00,030 --> 00:33:03,330 The fire island light is brilliantly lit. 434 00:33:06,250 --> 00:33:08,890 Narrator: A light appears on her port side. 435 00:33:09,560 --> 00:33:10,990 Delgado: It's another ship, 436 00:33:11,020 --> 00:33:14,030 Heading right for them and it strikes them dramatically on the side. 437 00:33:18,600 --> 00:33:20,930 Then the other ship backs off and disappears. 438 00:33:23,050 --> 00:33:25,520 The ocean is pouring into the heart of oregon. 439 00:33:31,600 --> 00:33:35,800 Narrator: Over eight frantic hours nearby boats rescue every passenger 440 00:33:35,830 --> 00:33:37,800 On board the oregon. 441 00:33:39,550 --> 00:33:42,590 Their dreams of a new life in america still intact. 442 00:33:46,660 --> 00:33:49,960 But the mighty oregon has suffered a fatal blow. 443 00:33:53,470 --> 00:33:57,720 Delgado: This greyhound of the atlantic has been gored and sunk just off the 444 00:33:58,090 --> 00:33:59,620 Entrance to the city. 445 00:34:01,060 --> 00:34:05,490 Narrator: While oregon never makes it to port thousands more liners do. 446 00:34:07,800 --> 00:34:10,430 Ellis island opens in 1892. 447 00:34:11,970 --> 00:34:16,050 Twelve million new americans pour through its halls. 448 00:34:19,630 --> 00:34:23,090 Ocean liners flood the harbor, beckoning a golden age... 449 00:34:25,330 --> 00:34:29,880 In just a century new york's population grows from 60,000 to 450 00:34:30,420 --> 00:34:32,640 Three and a half million. 451 00:34:34,090 --> 00:34:38,190 By 1900 it's the largest city in the western hemisphere. 452 00:34:39,130 --> 00:34:42,100 Drawing the eyes of the world. 453 00:34:42,570 --> 00:34:46,120 Including those who would try and take her down. 454 00:34:48,360 --> 00:34:50,220 40 miles from new york, 455 00:34:50,920 --> 00:34:53,420 Off the shores of long island. 456 00:34:53,460 --> 00:34:55,990 What sank this giant? 457 00:34:56,430 --> 00:35:00,430 And how does her sinking reveal new york's vulnerability at the 458 00:35:00,470 --> 00:35:02,680 Dawn of the 20th century? 459 00:35:12,900 --> 00:35:15,800 America is at war. 460 00:35:16,200 --> 00:35:17,770 Trans-atlantic convoys, 461 00:35:17,800 --> 00:35:20,220 Carrying troops and supplies to europe, 462 00:35:20,250 --> 00:35:22,720 Are key to the allies hopes of success. 463 00:35:24,320 --> 00:35:25,990 Protected by warships... 464 00:35:26,030 --> 00:35:28,590 Like the uss san diego. 465 00:35:30,300 --> 00:35:33,870 500-feet-long, over 13,000 tons... 466 00:35:34,900 --> 00:35:38,550 Armor-plated, with 40 guns of up to eight inches. 467 00:35:39,890 --> 00:35:43,490 And multiple watertight bulkheads to make her unsinkable. 468 00:35:48,800 --> 00:35:54,690 On July 19th, 1918, she's approaching new york to pick up a convoy. 469 00:35:58,590 --> 00:36:01,790 At 11:05 am, just outside the harbor, 470 00:36:03,930 --> 00:36:06,700 She is rocked by a huge explosion. 471 00:36:07,730 --> 00:36:11,020 Catsambis: Within 20 minutes the ship had sunk. 472 00:36:13,960 --> 00:36:17,490 San diego was the only major us navy warship lost in the great war... 473 00:36:18,400 --> 00:36:21,160 It happens to lie just a few miles from the coast of new york. 474 00:36:23,170 --> 00:36:25,200 Narrator: So, what happened? 475 00:36:27,750 --> 00:36:30,660 A team from the us navy has reopened the case. 476 00:36:32,080 --> 00:36:34,960 Led by archaeologist alexis catsambis. 477 00:36:35,900 --> 00:36:38,700 Catsambis: The question has lingered for over a century... 478 00:36:38,730 --> 00:36:40,830 What sank san diego? 479 00:36:42,920 --> 00:36:44,220 Narrator: To find out, 480 00:36:44,250 --> 00:36:47,220 Navy divers explore the wreckage of this sunken warrior. 481 00:36:50,060 --> 00:36:54,300 But it's impossible to see the whole picture through the murky waters. 482 00:36:58,130 --> 00:37:01,250 Working with the university of delaware, 483 00:37:01,590 --> 00:37:04,060 Alexis deploys three-dimensional scanning 484 00:37:04,090 --> 00:37:07,330 Equipment to map san diego's structure on the seafloor. 485 00:37:09,460 --> 00:37:12,200 Catsambis: This project is the first time we're getting comprehensive 486 00:37:12,230 --> 00:37:14,470 Remote sensing data. 487 00:37:14,900 --> 00:37:18,520 Narrator: Combining this new data with the latest computer imaging technology 488 00:37:19,660 --> 00:37:22,760 We can do something impossible before now... 489 00:37:25,900 --> 00:37:28,630 Reveal, in perfect detail, 490 00:37:29,030 --> 00:37:32,920 The wreck of a us casualty of the great war. 491 00:37:38,760 --> 00:37:43,800 The san diego comes into the light for the first time in 100 years. 492 00:37:47,870 --> 00:37:52,050 It's the beautiful sleek shape of her 500-foot hull that appears first. 493 00:37:55,890 --> 00:37:59,330 The steel structure is in remarkable condition for her age. 494 00:38:02,630 --> 00:38:05,370 Apart from this... 495 00:38:05,600 --> 00:38:09,350 Towards her stern, a section of the hull that's damaged. 496 00:38:10,390 --> 00:38:14,440 This is the blast site.... Eroded by decades of decay. 497 00:38:16,500 --> 00:38:18,930 But it appears to be below the waterline. 498 00:38:22,300 --> 00:38:25,890 If something hit the ship, it was beneath the surface. 499 00:38:35,300 --> 00:38:37,730 The team studies the historical records. 500 00:38:38,970 --> 00:38:44,220 There's no suggestion that engine malfunction or onboard ordnance caused the blast. 501 00:38:45,090 --> 00:38:49,290 Reinforcing the view that it could been caused by something more sinister. 502 00:38:59,690 --> 00:39:03,930 Advances in technology mean german u-boats can now cross the atlantic. 503 00:39:06,060 --> 00:39:08,600 Catsambis: This is a, a new era where submarine warfare 504 00:39:08,630 --> 00:39:10,200 Is taking over. 505 00:39:10,230 --> 00:39:12,830 Jaffe: The war was brought to new york shores. 506 00:39:14,190 --> 00:39:18,260 Narrator: By the 1900s new york is the planet's busiest port. 507 00:39:20,490 --> 00:39:24,600 An irresistible target for the imperial german navy. 508 00:39:28,170 --> 00:39:30,220 Watson: If you're an enemy of the united states, 509 00:39:30,250 --> 00:39:33,450 What is a more symbolic target than new york city? 510 00:39:36,590 --> 00:39:39,360 Narrator: The team wonders if a torpedo from a u-boat 511 00:39:39,400 --> 00:39:42,100 Could have caused the explosion? 512 00:39:42,970 --> 00:39:44,470 To answer the question, 513 00:39:44,500 --> 00:39:46,820 They calculate the original size of the blast hole. 514 00:39:49,020 --> 00:39:51,060 Catsambis: What damage is related to that original point of impact 515 00:39:51,760 --> 00:39:54,230 And that original explosion? 516 00:39:54,460 --> 00:39:58,860 Narrator: They find a report from a navy diver who visited the wreck in 1918. 517 00:40:00,270 --> 00:40:03,820 Cheser: He says he was along the bottom on the port side around no 4 smoke stack. 518 00:40:05,320 --> 00:40:08,360 Narrator: He estimates the cavity to be just 5 feet wide. 519 00:40:09,760 --> 00:40:13,330 Nahshon: That corresponds to being right below the armor belt which make sense. 520 00:40:14,600 --> 00:40:15,930 Narrator: Using this data, 521 00:40:15,970 --> 00:40:18,930 We can reconstruct the original blast hole... 522 00:40:22,360 --> 00:40:25,360 Could it have been caused by a torpedo? 523 00:40:30,460 --> 00:40:33,360 The team models the damage that world war I 524 00:40:33,400 --> 00:40:36,580 Torpedo payloads cause and get a surprise. 525 00:40:38,050 --> 00:40:40,290 Catsambis: It became rather evident that the torpedoes were simply 526 00:40:40,320 --> 00:40:41,910 Too large of a weapon. 527 00:40:41,940 --> 00:40:45,030 They carried too large of a charge and would have resulted in a hole that was 528 00:40:45,060 --> 00:40:47,460 Far larger than 5 or 6 feet. 529 00:40:48,900 --> 00:40:51,470 Narrator: They wonder if it was a min 530 00:40:51,730 --> 00:40:56,220 Incredibly, archives from the german government reveal u-boats were ordered 531 00:40:56,260 --> 00:40:58,760 To lay mines outside new york harbor. 532 00:41:00,430 --> 00:41:02,790 Cheser: They knew that it was an important area for shipping for the 533 00:41:02,830 --> 00:41:04,760 United states and allies. 534 00:41:06,300 --> 00:41:08,570 Narrator: But they discover standard german mines, 535 00:41:08,600 --> 00:41:10,750 Known as type 4, 536 00:41:10,790 --> 00:41:13,960 Also inflict a blast hole larger than five feet. 537 00:41:17,560 --> 00:41:19,860 Then, a key insight. 538 00:41:26,090 --> 00:41:29,790 By 1918, germany is running short of explosives. 539 00:41:32,860 --> 00:41:34,290 Catsambis: The germans, by the end of the war, 540 00:41:34,330 --> 00:41:36,430 Were using diminished charges. 541 00:41:37,860 --> 00:41:40,870 Narrator: And allowing for the reduced charge in a 'type four' mine... 542 00:41:41,770 --> 00:41:44,690 It produces a blast hole close to five feet wide. 543 00:41:47,320 --> 00:41:50,060 It appears to be a match. 544 00:41:50,530 --> 00:41:54,860 San diego was almost certainly hit by a small german mine. 545 00:41:57,130 --> 00:42:00,150 But there's another question... 546 00:42:01,220 --> 00:42:04,120 The hole is still tiny. 547 00:42:04,160 --> 00:42:07,390 How could it sink a 500-foot long ship 548 00:42:08,060 --> 00:42:12,700 In just 20 minutes and flip her upside down? 549 00:42:26,700 --> 00:42:29,660 The drained wreck of the san diego reveals another 550 00:42:29,700 --> 00:42:31,500 Piece of the puzzle. 551 00:42:33,590 --> 00:42:36,750 Catsambis: Understanding the weapon is only one part of a larger picture. 552 00:42:37,220 --> 00:42:41,030 We want to understand the whole sequence of events and how the ship sank. 553 00:42:43,900 --> 00:42:46,260 Narrator: Watertight bulkheads and doors are 554 00:42:46,300 --> 00:42:51,050 Specifically designed to stop the spread of water and keep this warship upright. 555 00:42:52,460 --> 00:42:56,060 But somehow san diego turned upside down. 556 00:42:58,160 --> 00:43:01,130 She sank through just 100 feet of water; 557 00:43:01,560 --> 00:43:04,120 Not enough for her to roll on the descent. 558 00:43:04,600 --> 00:43:07,320 She must have capsized at the surface. 559 00:43:09,990 --> 00:43:14,490 How did a small hole in a watertight section of this ship leave her lying 560 00:43:14,530 --> 00:43:16,410 Prone on the seafloor? 561 00:43:19,270 --> 00:43:22,850 Alexis and his colleagues are sure that water must have penetrated 562 00:43:22,890 --> 00:43:24,950 Further into her hull. 563 00:43:26,120 --> 00:43:28,720 Catsambis: We needed to understand how this happened... 564 00:43:28,760 --> 00:43:32,260 How did we get to the point where instead of simply sinking, 565 00:43:32,460 --> 00:43:34,960 The ship turned in on herself. 566 00:43:35,570 --> 00:43:40,950 Narrator: Analysis shows that even with substantial flooding san diego wouldn't capsize. 567 00:43:44,590 --> 00:43:48,160 Baffled, the team studies san diego's structure, 568 00:43:48,190 --> 00:43:50,290 Looking for signs of weakness. 569 00:43:50,600 --> 00:43:55,200 Nahshon: So here we can see a plan of the of the gun deck of the uss san diego. 570 00:43:57,120 --> 00:44:00,760 Narrator: But plans are no match for inspecting a real warship. 571 00:44:03,890 --> 00:44:07,090 A contemporary of the san diego, although a few years older, 572 00:44:08,030 --> 00:44:09,650 Is the cruiser: 573 00:44:09,650 --> 00:44:11,830 Uss olympia. 574 00:44:13,190 --> 00:44:16,050 The oldest steel warship still afloat. 575 00:44:21,430 --> 00:44:25,260 Examining her internal structure, the team makes a breakthrough. 576 00:44:26,700 --> 00:44:29,920 Catsambis: Then we realized that the fact that she was coal powered was critical and 577 00:44:29,950 --> 00:44:32,420 Crucial to our determination of how she capsized. 578 00:44:33,220 --> 00:44:37,190 Narrator: Coal, stored on deck, has to be delivered to the engine rooms below. 579 00:44:38,490 --> 00:44:40,760 Catsambis: So, this chute would have been somewhat like the one we would 580 00:44:40,800 --> 00:44:42,430 Find on san diego, 581 00:44:42,470 --> 00:44:45,370 It would have allowed coal to be deposited all the way through the coal bunkers 582 00:44:45,400 --> 00:44:48,220 And even though you can close it, it's still not watertight. 583 00:44:49,020 --> 00:44:52,390 Narrator: This weakness hadn't been clear on the san diego's plans. 584 00:44:53,190 --> 00:44:55,360 Catsambis: There were additional entry points we were not factoring in. 585 00:44:57,700 --> 00:45:01,530 Narrator: The watertight bulkheads prevent seawater from flooding the entire hull, 586 00:45:02,940 --> 00:45:06,970 But these chutes and a network of vents gave it another route. 587 00:45:09,560 --> 00:45:12,790 Catsambis: And so, water coming in through the gun deck would have permeated through 588 00:45:12,830 --> 00:45:16,560 These chutes into the coal bunkers and from there on to the engine rooms and 589 00:45:16,600 --> 00:45:19,000 The boiler rooms and throughout the vessel. 590 00:45:22,860 --> 00:45:25,320 Narrator: By examining san diego's wreckage, 591 00:45:25,360 --> 00:45:27,440 And piecing together the clues, 592 00:45:27,730 --> 00:45:31,700 We're able to tell her complete story for the very first time. 593 00:45:37,090 --> 00:45:40,090 The uss san diego is headed for new york. 594 00:45:41,320 --> 00:45:43,460 The horizon is clear. 595 00:45:43,760 --> 00:45:46,790 But there's danger lurking beneath the water. 596 00:45:50,630 --> 00:45:53,320 A german u-boat has laid a minefield. 597 00:45:55,320 --> 00:45:57,960 San diego brushes against one. 598 00:46:01,330 --> 00:46:05,130 Catsambis: Water spewed into the air and it started then flooding the 599 00:46:05,670 --> 00:46:07,570 Engineering and boiler room spaces. 600 00:46:10,150 --> 00:46:11,720 Narrator: As she lists, 601 00:46:11,750 --> 00:46:14,560 Water pours onto the gundeck from the port side. 602 00:46:19,700 --> 00:46:22,730 Rapidly penetrating the ship via the coal chutes and vents... 603 00:46:23,630 --> 00:46:26,220 Tipping her further. 604 00:46:27,790 --> 00:46:30,220 Catsambis: Within a few moments she had capsized and, and was on her 605 00:46:30,260 --> 00:46:32,260 Way to the bottom. 606 00:46:33,190 --> 00:46:37,660 Narrator: All but six of her 1,100 strong crew survived. 607 00:46:38,600 --> 00:46:41,830 But san diego sinks to her watery grave... 608 00:46:41,870 --> 00:46:44,290 Just miles from the heart of new york city. 609 00:46:46,960 --> 00:46:49,890 A heavyweight victim of a calculated attack. 610 00:46:57,370 --> 00:47:00,750 Draining new york city reveals stories of conflict, 611 00:47:03,060 --> 00:47:06,460 Immigration and ruthless ambition. 612 00:47:08,430 --> 00:47:12,530 Today the spirit and success of this remarkable city... 613 00:47:12,570 --> 00:47:15,000 Still invites enemy attack. 614 00:47:15,400 --> 00:47:19,350 To which new york gives a familiar reply. 615 00:47:19,890 --> 00:47:20,990 Captioned by cotter captioning services. 59272

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