Exactly this. I have driven and biked by the Pentagon for years and although plausible to perfectly fly a plane that big and not hit surrounding obstacles or the ground prior to the building, would take a mastery of flying, that no way, no how, a terrorist/hijacker would ever possess.

Exactly this. I have driven and biked by the Pentagon for years and although plausible to perfectly fly a plane that big an not hit surrounding obstacles or the ground prior to the building, would take a mastery of flying, that no way, no how, a terrorist/hijacker would ever possess.