EconProf: That is true, however, more than a handful of plots by Muslim extremists in the USA (that leaked out) were thwarted by the FBI and other law enforcement agencies. 9/11 raised the public awareness that this kind of terrorism could occur in this country and also caused more people to report suspicious behavior. Some groups and individuals like to claim that their personal liberty is being taken away but I would rather endure the extra security than have my friends, family and country blown up by religious & political extremists.