"It's because they're so vulnerable, any event tips the balance," said Cutter, director of the school's Hazards and Vulnerability Research Institute. "They don't have the kind of resiliency that other ...

Just before 5 p.m. on Wednesday, January 13, a magnitude-7 earthquake struck Port-au-Prince, Haiti, flattening hundreds of buildings and killing as many as 100,000 people. (Related slideshow: Haiti ...