Oxygen Issue News Today : Breaking News, Live Updates & Top Stories | Vimarsana

>> the noises were heard by a canadian p-3. and that was this morning and some yesterday. >> reporter: the noise described as banging sounds at regular intervals in the department and homeland security briefing are now described as less specific than that. but still, the focus of the search. >> we need to have hope, right? i can't tell you what the noises are. what i can tell you, and i think this is the most important point. we're searching where the noises are. >> reporter: the sounds picked up by buoys like this one dropped from planes. and then listening for any sounds of life fr...

First kilometer, they have to go through a space that they barely fit through if there was no water. imagine, they're having a tank pushed in front of them, a diver that goes ahead and behind and this is all about trying to prevent panic. to convince the kid that is going to be safe and she's wearing, i guess it's all he, they are wearing a full mask. in some ways that's helpful because they are breathing through knows and mouth, you don't want to get that corrupted with water. that would create sense of panic. it's really a psychological battle more than a physical one. rob: when i first hear...

But two weeks out of your norm is -- never mind the mental angui anguish, it's tough on the body. >> it's tough on the body. look, yes, their age is an advantage here. if you think about the oxygen issue alone. some experts who are consulted said look if you were an older individual and you were exerting yourself getting to an oxygen depp privation of 15%, can be serious, but the kids can tolerate this. >> if you're a climber, you will often train yourself to exist on a smaller amount of oxygen. >> absolutely. let's also talk about the risk of something bad happening from hypothermia. older ag...

The door open the door! apparently he may have grabbed an ax. >> there's a loud metallic banging against the cockpit door. it could be the fire ax that the main pilot grabbed to try to get inside. and as heard again and the jet at 7,000 feet at that point. 90 seconds later there's a new warning message "ground. pull up!" it's horrifying. about eight minutes before the plane plows into the mountain, screams are heard from the body of the plane from the passengers who apparently are aware. we heard earlier that the passengers didn't know what was going on until the end. it turns out to be unfort...

Laymen. what is the captain, the flight crew, considering if they are in this emergency situation and you are over the french alps. what are you looking for? >> well, the first job is to get the airplane to an altitude. a trick in the alps is the terrain is high. you try to descend to a lower altitude to breathe better but you have terrain considerations as well. you can descend but not too low or you'll have a terrain issue. so that could be the problem. once you have the airplane under control and you have an idea of how you're going to handle the pressurization issue or the oxygen issue, yo...