He's lying, I think. If memory serves, they determined that the plane that hit the Pentagon was might initially have been trying to hit the WH -- they made a couple of circuits of DC before heading off to the Pentagon.
"Might is the key word there". It's also possible that the Jiahdie in the left seat might have been having trouble lining up on the Pentagon. He hit low as it was, striking the ground before hitting the building. Damage would have been worse if he'd hit the roof, or in the center courtyard.