The Big Picture has posted a gallery of photos from Hurricane Katrina damage:
Five years ago, Katrina struck the Gulf Coast, centered on New Orleans, as a Category 3 hurricane with sustained winds of 125 mph (205 km/h). More than fifty levees were breached by its storm surge, causing massive flooding. Over 1,800 Gulf Coast residents lost their lives then, and damages totaled more than $80 billion – the costliest hurricane in U.S. history. Many intangible things were damaged then as well, communities were erased as their neighborhoods washed away, much of historic New Orleans was badly damaged, and frustration and anger remain towards an inadequate immediate response by the U.S. government.
Be sure to check out these Google Earth images of the area, before and after the storm.