Abu Musab al Zarkawi, born Ahmad al Khalayla in Jordan, is the current deus ex machina of the terror war against the Coalition in Iraq. He is credited with numerous assassinations — including that of an American official, Thomas Foley, in Amman — and suicide bombings, along with the spectacular but little-reported attempt to launch a chemical attack against American targets in Jordan. Secretary of State Colin Powell named him on February 3, 2003, in his speech to the United Nations. Powell reported that Zarkawi had been sighted in Baghdad, where one of his legs had been amputated due to...