there was speculation that perhaps the plane may have stalled. could it have hit turbulence and could it have hit a thunderstorm stronger than what the pilot and flight crew anticipated? yes any of those things. the air traffic controller rescinded it because there was other traffic there. the pilot in command has the ability and the responsibility if he sees something he canada vert around he can divert around anything. if the pilot thought he was going foo something he thought going into something he thought was severe danger he would have no problem against veering around that. apparently there might have been some weather there that might have affected the airplane to the degree that something didn t work right. an engine may have ingested ice. there may have been a catastrophic fail your due to winds, any number of things. we will know probably in the next couple days.