LANGLEY AIR FORCE BASE, Va. -- Staff Sgt. Jesse Zainey, 633d Civil Engineer Squadron firefighter, prepares to enter a crashed C-17 during a Major Accident Response Exercise Aug 12. The MARE scenario involved a C-17 crash with nuclear munitions on board and was designed to test the preparedness of first responders and base personnel. (U.S. Air Force photo/Staff Sgt. Ashley Hawkins)