Firefighters with the 3rd Civil Engineer Squadron discuss the situation around an outlined area where, if had a pipe had been punctured, the surrounding ground would have been covered in fuel during Arctic Edge 10, April 27, 2010. Arctic Edge 10 is a major exercise conducted in cooperation with the State of Alaska Division of Homeland Security and Emergency Management and other federal, state and local agencies. (U.S. Air Force photo/Senior Airman Cynthia Spalding)