It is impossible that a 757 could travel at the 500+mph they claimed it was going when it hit the Pentagon.
The wings can only support 500+mph in the thin air of the upper atmosphere.
A typical commercial passenger jet cruises at a speed of about 400 - 500 knots which is around 460 - 575 mph, and when full throttle + gravity (aimed at the ground) it could be faster.
In your scenario, the aircraft would have to be in a sharp nose-down attitude and would suffer structural failure long before hitting the ground; which is not consistent with the photo we are posting about.
Like I stated, a Boeing 757 cannot sustain 500+mph in the conditions present at the Pentagon on 9/11 as depicted in the photo.
