I agree with you, but in 2001, those were American pilots with American planes. Those were not planes from other countries. The planes that hit those targets left from the United States. We are talking about airplanes from American companies. What guarantees do you have that this won't happen again? The cockpit may be closed, securely shut, locked, but if the pilot has control of the airplane, what are you going to do?
On March 1st, 2011. See this statement in context.