no plane. and then more than a year later, some debris from flight 370 would wash up on the island of reunion. but neither the full body of the plane or passenger remains were found. what s still a mystery, why did the jet go down? and now there s a new theory. william langavisha is a writer and professional pilot, the author of vanished: malaysia flight 370 disappeared. william, this is a fascinating piece. explain to us how you came to the conclusion that mh-370 was hijacked from inside the cockpit. what s the evidence? it s really a process of elimination. you look at what the airplane did, how it flew, how long it flew, where it flew to before we lost contact with it. you realize this was an intentional act. this is not a random thing, not equipment failure. somebody did this.