Please describe for us the one measure taken by the TSA that, had it been in effect on 9/10/01, would have prevented 9/11 (TM). Excluded answers include locking cockpit doors, no longer cooperating w/hijackers, & banning of boxcutters which both pre-dates the TSA & is nothing more than symbolic given that scissors w/blades up to 4 in, much longer than those in boxcutters, are allowed. TSORon has been asked this question multiple times when he has tried to make similar claims, but he tends to just run & hide.

Please also refrain from the use of terms such as 'cupcake', 'sport', et al in your answers.