see the wreckage of the titanic. this hour the supply of oxygen is rapidly running out. we ll show you what conditions are like inside the small, cramped sub that left with five people on board. china is now lashing out at the united states after president joe biden referred to chinese leader xi jinping as a dictator. this as cnn is getting an exclusive look at military drills preparing for a potential chinese invasion of taiwan. welcome to our viewers in the united states and all around the world. you re in the situation room. let s get right to the massive search for the missing submersible. the source of banging sounds in the area remains a mystery at this hour but they are giving rescue crews hope. when you are in the middle of a search and rescue you always have hope. that s why we re doing what we do. reporter: with what could be less than 24 hours of oxygen left onboard titan, hope at this point may rest on banging noises detected by sonar. the coast guard re
reporter: a cbs correspondent was on board the titan last year and climbed into the vessel with stockton rush the ceo of oceangate expeditions and pilot of the titan. his report describes the inside as having about as much space as a minivan. there are no chairs or seats. passengers sit cross legged on the floor. there is just one button on the wall, one video screen, and only a single port hole. and maybe the most surprising feature that rush showed we run the whole thing with this game controller. reporter: come on. reporter: a hand held controller that looks like a gaming console. i didn t know at that point that you drive the thing with an xbox game controller. i didn t know the ballast was used construction pipes. you get there and you start seeing this stuff and now your mood crashes and you get a little worried, like is this the level of polish and sophistication we re talking about? reporter: adventure your mike reese who traveled to the titanic on the titan last
affect your mood. jenna: what about night lights for kids? no, i don t think so that it is a good idea. do it as purpose to get around. it is not good to leave light on at night for any reason. it affects the pattern of sleep. ultimately it could affect you. kids are little. they re young, it is not a big problem. people like myself, we want everything dark. jenna: we have to get to the next study as well, dr. manny. jon you want to take the mantle for this one. jon: this is called the sit test. jenna: literally a test. jon: people getting up there in years. the challenge to sit cross-legged on the floor and see if you can rise without going to your knees, without touching your knees to the floor or without using your hands. doctors have found it is actually a very good predictor how long you re going to live? is that true, dr. man any. the folks in the screen are cheating. you have to sit down and try