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traveling 400 miles to the site of the title 42 for a ten-hour journey two miles below the ocean surface to explore the breckage. there were five people onboard. less than two hours after their descent they stopped communicating with the parent ship. the u.s. navy detected a sound that could have been an implosion in area and reportedly forwarded that information to the incident commander. that was not release olympicly. rescuers needed to find it quickly because it had 96 of ox. over the next hour, step by step through the five-day search for missing submersible, everything we know ...

welcome to "the whole story." i'm anderson cooper in st. john's, newfoundland. "titanic" set out from here traveling 400 miles to the site of the title 42 for a ten-hour journey two miles below the ocean surface to explore the wreckage. there were five people onboard. less than two hours after their descent they stopped communicating with the parent ship. the u.s. navy detected a sound that could have been an implosion in area and reportedly forwarded that information to the incident commander. that was not released publicly. if the titan was still in act, rescuers needed to find it ...

and not the one i want. >> take 20 so i don't eat them, yes. >> okay. well, go to jake tapper's house, not laura coates. you get one piece of candy and probably black licorice. >> you probably give apples. >> i've given toothbrushes from time to time. i have. not just kidding i give full cans of sodas, too. the parents hate me. >> nice. this is "cnn tonight." i'm laura coates. as i mentioned allison is on assignment. we're going to have a panelists from across the spectrum and they're on the screen right now. here is a really provocative question that we're going to tackle tonight....

Titanium or steel alloy. "titan" is built much differently. it's belt with carbon fiber. carbon fiber is this miraculous space-age polymer, what we are using to build the next generation of aircraft. one of the concerns is how it performance over time. how does it fatigue? how does it deal with these pressure cycles going back and forth. >> it give you an idea about what kind of pressures we are talking about, would be about 380 atmosphere. an enormous amount of pressure. right here where i'm sitting there one atmosphere. so 380 times that pressure. >> according to arnie weissman, whose may di...

Sub goes. >> all of the subs that have been built to go it "titanic" are welded together and made of titanium or steel alloy. "titan" is built much differently. it's built with carbon fiber. carbon fiber is this miraculous space-age polymer, what we are using to build the next generation of aircraft. one of the concerns is how it performance over time. how does it fatigue? how does it deal with these pressure cycles going back and forth? >> just to give you an idea about what kind of pressures we are talking about, it would be about 380 atmosphere. an enormous amount of pressure. right here wh...