United States Navy Petty Officer 2nd Class Christopher Graham, an aviation mechanic with the U.S. Navy Patrol Squadron One, Whidbey Island, Washington performs post flight maintenance on a LSRS (P3) during the Northern Edge Premier Joint Training Exercise at Eielson Air Force Base, Alaska, June 20. This exercise emphasizes a mixture of joint forces for real world contingencies. (U.S. Air Force photo/ Staff Sgt. Lakisha A.Croley)