CNN Anderson Cooper 360 March 19, 2014 00:11:00
That they decided to attempt contact with the airplane. that means, where are they? in other words in their head they're saying, where is this airplane? so the first attempt would be to contact them on the frequency they were designated to be on. then they would attempt on the guard frequency, which is the emergency frequency. after that they would try to relay through another airplane. so it indicates to me that maybe the problem was developing but for that other airplane, it's not uncommon to not be able to contact them as a favor to air traffic control to relay information. so they probably...