Do you believe that a plane hit the pentagon on September 11, 2001?

Terrorists hit the Pentagon in virginia. The government wouldn't kill their own on American soil like this. I saw the big hole in the Pentagon and my dad was a few miles from arlington in DC. How did united 93 get control of the plane in PA? It flew over airspace that is never traveled upon. My grandmother lives in Scottdale only miles from its crash site. That was the first commercial plane she'd seen over that town.