A raid on a Pakistan Al-Qaeda cell recovers two laptops. When the computers' booby-traps are defused and the computers decrypted and translated, they indicate that Al-Qaeda has planned a series of simultaneous attacks in five U.S. cities involving potential dirty bombs, biological weapons and maybe even a nuclear weapon-on Election Day. Derek Stillwater, troubleshooter for the Department of Homeland Security, is assigned to a multi-jurisdictional...