June 25, 1996, a powerful truck bomb exploded outside the Khobar Towers barracks in Dhahran, Saudi Arabia, tearing the front from the building, blasting a crater 35 feet deep, and killing 19 American soldiers. Hundreds more were injured. When news reached Washington, Presi dent Bill Clinton vowed to bring the killers to justice. “The cowards who committed this murderous act must not go unpunished,” he said angrily. “Let me say again: We will pursue this. America takes care of our own. Those who did it must not go unpunished.” The next day, leaving the White House to attend an economic summit in France, Clinton had more tough words for the attackers. “Let me be very clear: We will not resist” — the president corrected himself —...