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Be assisting the french in this investigation, presumably looking into this co-pilot's activities when he was training in arizona because he did as a part of the lufthansa training train in arizona, that's very common. lufthansa has a school in arizona that it uses. and they willen be looking at that and entire psychological profile of this 28-year-old. >> that could be where more answers come from. the distinction now for certain airlines looking at this as a security concern, we have some european airlines already making safety changes. >> norwegian air has already come out today and said ef...

Capability can fly without engine and still transmit a communication to air traffic control and say i'm in trouble it. doesn't mean he was focused on the job at hand but something tumultuous had occurred and it could be something analogous to 447 but something might have been happening that occupied their time they were occupied. >> and couldn't communicate. >> couldn't communicate. >> and this came up in my conversation with captain sullenberger. he said the regulators are too slow to require and implement safety changes after you have a safety crisis. he gave an example which i thought was f...

Given a 15-month suspended prison sentence for going against industry norms to forge the piece of metal that fell to the ground. >> i don't think that that piece of metal brought the airplane down. i think it played a factor in the cause of the accident but i don't think it was the sole responsible cause of the accident. >> even before the verdict, the -- i don't think it was the sole, responsibility cause. aviation industry agrees on drastic safety changes. debris on the runway is now seen as an even greater threat to aircraft. manufacturers begin producing burst-resistant tires and tuel tank...

Oxygen is generated and released into the hold. the reaction also produces heat with temperatures of up to 500 degrees fahrenheit. the combination of heat and pure oxygen creates a voracious fire. inside the hold, the pure oxygen allows the fire to burn through the liner and up into the cabin, melting the floor beams under the passengers' feet. >> they discovered that it had already burnt up pretty much in the sky. >> it was a breakdown there. there was a series of communications breakdown. a lot of safety changes came out as a result. there's absolute flat prohibition against shipping oxygen ...

Son's life never happens again. >> we have to try to do the good work he was supposed to do here. >> reporter: sandy hook elementary is being torn down and kids that were supposed to go there are heading to another elementary school. more safety changes are expected to take place in newtown schools over the course of a year but officials couldn't elaborate on what that would entail. it's not just newtown. school districts across the country are adding more armed security guards in their schools especially elementary schools. three states have passed laws to allow teachers to carry handguns on ...