we are back with a fox news alert. complete destruction. overnight a passenger plane traveling from egypt to russia crashes after vanishing from the radar 224 people on board. 17 of them children. rescue crews are now on the scene in search of survivors. >> so what do we know and what exactly might have gone wrong? joining us is pilot and aviation expert. >> great to see you this morning. >> good to be back with you. >> this aircraft contrast to most planes that crash is not taking off or landing is cruising altitude according to radar. what are the spectrum of possibilities here? what might have done with wrong with this plane? >> that's not the first thing that jumps out at you a. '11,000 feet. there is really very little that can go wrong up there. we have seen it before. so it's not, you know, not uncalled for, but, very rare that any cruise area of