The commander of the Iraqi militant group Islamic State of Iraq and Syria (ISIS) reportedly blew up 21 suicide bombers in training when he made an error during a live explosives exercise. 15 other trainees were injured. The popular imagination paints terrorists as hundred-foot-tall supermen with the power to destroy entire states simply by staring crosseyed at them, but the reality is that people who are willing to be suicide bombers — and those who exploit them — may not be very bright at all.