[a href="vny!://www.physics911.net/sagadevan.htm"]vny!://www.physics911.net/sagadevan.htm[/a]
If a 757 were placed on the ground on its engine nacelles (i..e., gear retracted as in flight profile), its nose would be almost 20 feet above the ground.
Ergo, for the aircraft to impact the ground floor of the Pentagon, Hanjour would have needed to have flown in with the engines buried 10-feet deep in the Pentagon lawn. Some pilot!