Excerpted from: 9/11: Impossible Speed & Impact -- Busted! Updated www.youtube.com/watch?v=L978nIT-AY4 The F4 Phantom is being flown by Captain Field McConnell, in the refuelling shot, and in the following shot he is almost at ground level at a speed in excess of 600 knots—over 690 mph. As he has since remarked in an e-mail to me: "Engines don't choke." Following some critical comments from the usual armchair aviation experts, I e-mailed this formally-phrased question to him: Could a Boeing 767-200 have dived from, say 30,000 feet, then levelled off to hit the South Tower moving at 586 mph (509 K)? His answer was: "Yes."