A helicopter drops water on a fire in the aftermath of Hurricane Katrina in New Orleans September 6, 2005. Floodwaters that swamped New Orleans slowly receded on Tuesday after engineers plugged breaks in levees and pumped water to drain the historic city of the stagnant pool left by Hurricane Katrina. Black smoke billowed across the sky from several building fires, the latest safety threat after Katrina slammed into the U.S. Gulf Coast on August 29, possibly killing thousands of people.
