In the moments before America was attacked by terrorists on Sept. 11, 2001, Ben Cohen, the co-founder of Ben & Jerry's ice-cream kingdom, was begging for a real enemy of the U.S. to show up. In an ironic and hauntingly prophetic Internet column dated Sept. 4, 2001, Cohen posted an "enemy wanted" ad, hoping that a worthy adversary would soon make itself known to justify President Bush's defense budget: ENEMY WANTED. Serious enemy needed to justify Pentagon budget increase. Defense contractors desperate. Interested enemies send letter and photo or video (threatening, OK) to Enemy Search Committee, Priorities Campaign, 1350 Broadway,...