For Kathy McAllister, the earthquake in Haiti isn’t a news story that’s faded. It takes shape every time she sees her husband—a Haitian who was stuck in a building that collapsed, the sole survivor pulled from the rubble. Or when she hears from her sister-in-law, caught in a world that “has been turned upside down, with no end in sight.” It’s tales of tent cities and a collapsed government, of people living outside their homes for fear of an aftershock. But it’s als...