Norman, Oklahoma (population 100,923), is as American heartland as it gets. So on October 1, 2005, when Joel Hinrichs III, a 21-year-old Colorado Springs, Colorado engineering student at the University of Oklahoma strapped explosives to his body and blew himself up outside the college stadium where 84,000 fans were watching a Saturday-night football game, thus earning the town the distinction as home to America's first suicide bomber, I was, well, curious. Within 24 hours of the event, three players in the unfolding story issued statements aimed at quashing rumors that the bombing was terrorist related. University President David Boren, in...