I would do many things, some having nothing to do with 9/11, obviously, given the utter retardation of our policies. As for things that relate to 9/11 specifically, I really wouldn't do anything. It was a freak occurrence and no amount of misguided authoritarian policies will prevent something like this from happening again. It's a risk you take while living, much like the risk everyone takes when they go outside. If your car was hit by lightning, would you never go into your car again? Policies should be enacted from the basis of reason and justness, not from knee-jerk reactions designed to get votes from the feeble-minded.