...But terrorists come from all socioeconomic backgrounds. For poor people in countries where economic prospects are bleak, jihad can be one of the few jobs available. Of the 25,000 insurgents and terrorism suspects detained by U.S. forces in Iraq as of 2007, nearly all were previously underemployed, according to Maj. Gen. Douglas Stone, the commander of detainee operations at the time. And according to Christopher Boucek of the Carnegie Endowment, the Saudi Interior Ministry found that most of the 639 convicted terrorists going through a rehabilitation program came from lower- or middle-class families, while 3 percent had high-income backgrounds...