Im new to this site and like many of you I have some serious issues concerning the planes that attacked our national landmarks.
1. If Im not mistaken all the planes that crashed were 757's. Can an airliner of that size fly at 500mph plus at the altitudes reported?
2. Are there any failsafes that keep a airliner from traveling at those speeds at the altitudes reported?
I have a lot more questions but these are the two that I've had trouble finding answers to. I appriciate the responses and thanks!