Which could explain why the plane took an abrupt turn.
Which could explain why the plane took an abrupt turn.
If I remember correctly, ALL cockpit doors have been retro-fitted to keep intruders out of the cockpit. Also, the tower received no reports of problems (I think I heard this today). Keep in mind that this happened within (4?) minutes of takeoff. They were still climbing, and it seems a VERY short amount of time for a hijacker to announce himself, gain access to the cockpit, kill the pilot, and gain the controls.
No tinfoil hat here, but, IF it was a terrorist act, it would have to have been a bomb on-board, or a missile/projectile (of some sort). Intellectually, I'm leaning towards mechanical failure, but my heart tells me it COULD have been a bomb.