A man makes his way out of flood waters as a home burns in the seventh ward of New Orleans during the aftermath of Hurricane Katrina September 6, 2005. The toxic brew of chemicals and human waste in the New Orleans floodwaters will have to be pumped into the Mississippi River or Lake Pontchartrain, raising the specter of an environmental disaster on the heels of Hurricane Katrina, experts say. REUTERS/Shannon Stapleton BEST QUALITY AVAILABLE