I'm still unsettled about that. I'm an old aviator and spent time as an airline pilot, airline safety instructor, military pilot, even a year In an air traffic control center. And can well imagine what happened that day on all those fronts.
What the attackers did took lots of planning and practice. I don't think the Pentagon was an intended target. And who knows what the intended target of the 4th plane was.
I have lots of still unresolved questions. Like how did the terrorist take over the cockpit without upsetting the airplanes? Cockpits are pretty cramped spaces and it's hard to imagine someone forceably taking control without moving the controls to extreme positions. Even if the terrorist delivered paralyzing injections, it's difficult to imagine the movements without also moving the controls or moving one or more of the dozens of switches and leavers in a cockpit.
Also, I can't imagine 4 flights with no deadheading pilots or vacationing or commuting pilots. And that raises suspicions about whether the terrorist had assistance in picking which flights to hijack. There's quite often a extra occupant or two in the cockpit, and commuting or vacationing crew members in street clothes. People who could have made the terrorist plans more difficult to pull off.
