Searching for survivors
From an HH-60 helicopter, Tech. Sgt. Keith Berry scans the flooded streets of New Orleans searching for survivors on Sept. 4, 2005. A provision of the 2012 National Defense Authorization Act permits the secretary of defense to mobilize Air Force reservists like Berry if they are needed to respond to natural disasters such as Hurricane Katrina. (U.S. Air Force photo/Master Sgt. Bill Huntington)