Since Sept. 11, the finest minds in intelligence and law enforcement have worked ceaselessly to prevent another terrorist attack. And yet most experts agree there will be other attacks. When the FBI recently warned scuba operators to watch for terrorists trying to bomb ships, it became clear no plot was too contrived. The conventional wisdom now says an attack can come from anyone, including Americans, and hit anywhere — from the prairie where lethal microbes could destroy confidence in the food supply to cities where a dirty bomb might spread radiation for blocks and panic for miles.
Equally worrisome is the vast arsenal of terrorism: germs, chemicals, radiation, malicious computer codes, hijacked aircraft, conventional explosives and, possibly, small nuclear weapons. Some are difficult to get or require scientists to build. Others are available at the hardware store, as Timothy McVeigh demonstrated in the Oklahoma City bombing. Just add some street smarts, cash from a wealthy sympathizer, an easily obtained student visa, and the results could be disastrous.		Conventional wisdom now says an attack can come from anyone, including Americans, and hit anywhere.