Terrorist movie plot contest

Mark W. says:

Noted security specialist Bruce Schneier is sponsoring a contest on his blog for people to come up with the most ridiculous yet plausible movie-plot security risk. The winner gets a free copy of his book "Beyond Fear", and maybe even the chance to discuss their idea with a real-world movie producer…

From his site: "It is in this spirit I announce the (possibly First) Movie-Plot Threat Contest. Entrants are invited to submit the most unlikely, yet still plausible, terrorist attack scenarios they can come up with.

"Your goal: cause terror. Make the American people notice. Inflict lasting damage on the U.S. economy. Change the political landscape, or the culture. The more grandiose the goal, the better.

Assume an attacker profile on the order of 9/11: 20 to 30 unskilled people, and about $500,000 with which to buy skills, equipment, etc."