No one is 100% sure what happened (not until the blackbox is found)... Various reports of an explosion in the sky and a ball of fire heading towards the sea. Another one is that the tower asked them to head in one direction and they headed in a different direction (maybe it is at that point that the pilot lost control of the B737 jet). Another theory is that the plane was struck by lightening and broke up into several pieces... Military ships and helicopters are literally combing the sea. Wreckage (and some bodies) are washing up on the shores... Chances of finding anyone alive are basically non-existant. Very unfortunate event. My condolences to all those families who lost loved ones on that flight.