JOINT BASE ELMENDORF-RICHARDSON, Alaska -- Firefighters from the 673rd Civil Engineer Squadron at Joint Base Elmendorf-Richardson complete rescue training June 17, 2011. In addition to maintaining the same training qualifications as civilian firefighters, the Airmen must learn how to rescue aviators from the various aircraft participating in Exercise Northern Edge 11. More than 6,000 servicemembers and 150 aircraft are participating in Alaska's largest military training exercise. (U.S. Marine photo/Cpl. Marionne T. Mangrum)