David Campbell's personal and professional life changed course in the wake of the Indian Ocean tsunami of December 26, 2004. A chance remark to a friend about the tragedy led his companion to reveal that he had dined, just a week prior to the tsunami, on a hotel patio where everyone had been killed. "In that moment," Campbell remembers, "a faraway event was brought much closer." That meeting launched Campbell into action. After researching travel and lodging, he packed everything he thought he would need in a major disaster zone and boarded a plane to Thailand. But his most important asset...