More Thoughts on the Hijackings

The cockpit is a smallish place and the door to the cockpit is narrow. The door can fit one person at a time, who sort of has to climb in to where the pilots sit. I simply cannot see how the hijackers could have forced entry into the cockpit and disabled both pilots at once. One hijacker could get in, and then do what? Attack one pilot. Surely the other pilot could turn on the emergency alarm when he sees the other pilot attacked. Not to mention that many of the pilots were big men, Vietnam vets, and should have been able to put up a fight. I just don't see how the hijackers could overpower both pilots four out of four times. If you were a terrorist, would you count on this for your plan to succeed? Nor do I buy the idea that security was REALLY lax for the hijackers and they got guns, bombs and/or gas on board.

I still think the most likely explanation is electronic hijacking plus electronic jamming of plane signals going out.