flight. the helios flight. this went down after the crew was overcome and they had a case of dramatic decompression. they basically ran out of oxygen and everyone passed out on board according to the investigators. what happened in that case the plane flew for quite some time on auto pilot. in the end there was a heroic effort by one flight attendant who roused long enough to try to fly the plane but really couldn't do anything with it. the end result was that last 15 minutes, look at that pattern. it's quite different. in this case the pattern is the plane basically running out of fuel still on auto pilot drifting down and crashing too, with all lives lost. you can see three different flights, all with the same result in the end, a terrible terrible crash. but very different patterns as to how it occurred. >> tom foreman, fascinating history right there. i appreciate it. want to bring in our panel of experts to discuss these theories. aviation analyst miles o'brien is with us. john gadzinski is former