I feel compelled to mention Celine's Law: National Security is the cause of National Insecurity.

The only real way for the government to prevent terrorism is for them to develop artificial wombs to grow surgically removed fetuses in, train the Bush Youth to operate in pairs, then assign a pair to every person in America at all times. Laws to see what people read, or to prevent them buying guns at gun shows, or even buying weapons of a certain caliber won't prevent terrorism. Anyone who thinks so is either deluding themselves, or attempting to delude others.