A 455th Expeditionary Aircraft Maintenance Squadron crew repairs an A-10 Thunderbolt II at Bagram Airfield, Afghanistan on April 6, 2012. The 455th EAMXS is responsible for repairing and maintaining military aircraft at Bagram Airfield as well as performing preventative maintenance inspections. DoD photo/Airman 1st Class Ericka Engblom, U.S. Air Force. (Released)

U.S. Marine Corps Lance Cpl. Brandon Mann uses his automatic rifle's scope to scan the area while providing security with his military working dog, Ty, around the villages of Sre Kala and Paygel in Helmand province, Afghanistan, Feb. 17, 2012. Mann, a military working dog handler, and Ty, an improvised explosive device detection dog, are assigned to Alpha Company, 1st Light Armored Reconnaissance Battalion. U.S. Marine Corps photo by Cpl. Alfred V. Lopez

Army Maj. Gen. Thomas H. Katkus, Alaska’s adjutant general, races to the finish line during the "Top Brass" Charity Sled Dog Race in Anchorage, Alaska, Feb. 11, 2012. U.S. Army photo by Maj. Guy Hayes

A Marine with Company B, Battalion Landing Team 1st Battalion, 4th Marines, 31st Marine Expeditionary Unit, eats a cooked insect during a jungle survival class on Feb. 13, 2012. The survival instruction taught by members of the Royal Thai Marine Reconnaissance educated U.S. and Republic of Korean Marines on finding sustenance and tools in the jungle environment. The class is part of exercise Cobra Gold 2012. The exercise is a multi-lateral event focused on strengthening the interoperability of all participating military forces. DoD photo by Cpl. Jonathan G. Wright, U.S. Marine Corps. (Released)