When the US government's National Counterterrorism Center compiled its annual report for 2009, it didn't overlook the deadliest terror attack on American soil since 9/11. "On 5 November 2009, at 1:30 PM, in Fort Hood, Texas," the report notes in its chronology of "high-fatality terrorist attacks" — those that took at least 10 lives — "an armed assailant entered the Fort Hood Soldier Readiness Processing Center and opened fire, killing one civilian and 12 soldiers, wounding seven civilians, 17 soldiers, and 18 [other] people, and damaging the facility.… No group claimed responsibility, although authorities believed an unaffiliated Sunni extremist was...