Like many seismic events, Katrina’s true impact might take a while to absorb. What started as a natural disaster soon became an unforeseen social meltdown and potential political crisis for the president. The poverty, anarchy, violence, sewage, bodies, looting, death and disease that overwhelmed a great American city last week made Haiti look like Surrey. The seeming inability of the federal or city authorities to act swiftly or effectively to rescue survivors or maintain order posed fundamental questions about the competence of the Bush administration and local authorities. One begins to wonder: almost four years after 9/11, are evacuation plans...