United States Department of Defense

U.S. Army Sgt. Zach Smola, rear door gunner on a CH-47 Chinook helicopter keeps watch on the mountains in the Chorah district of Uruzgan province, Afghanistan, May 12, 2013. Smola is assigned to Company B, 2nd Battalion, 104th Aviation Regiment, Connecticut and Pennsylvania Army National Guard. U.S. Army photo by Sgt. Jessi Ann McCormick

As seen through a night-vision device, U.S. soldiers work with CH-47 Chinook helicopter crews during a sling-load operation on Jalalabad Airfield in Nangarhar province, Afghanistan, May 10, 2013. The helicopter crews are assigned to the 101st Airborne Division's 101st Combat Aviation Brigade, and the soldiers are assigned to the 101st Airborne Division's 426th Brigade Support Battalion, 1st Brigade Combat Team. U.S. Army photo by Sgt. 1st Class John D. Brown

U.S. paratroopers demonstrate their enemy prisoner-of-war handling techniques to Indian soldiers as part of partnered field training during Yudh Abhyas 2013 on Fort Bragg, N.C., May 8, 2013. U.S. Army photo by Sgt. Michael J. MacLeod

U.S. Navy Seabees compete in a fire truck pull exercise during a fitness and health fair on Joint Base Pearl Harbor-Hickam, Hawaii, May 15, 2013. The service members, Defense Department civilian workers and contractors participated in the fitness and health fair, which included the 200-foot fire truck pull by six-person teams. U.S. Navy photo by Petty Officer 3rd Class Diana Quinlan

Midshipmen from the U.S. Naval Academy Class of 2016 navigate an obstacle course during the U.S. Naval Academy Sea Trials at Annapolis, Md., May 14, 2013. U.S. Navy photo by Petty Officer 2nd Class Todd Frantom

U.S. Army Pfc. Danny Norman cleans a vehicle during a vehicle decontamination exercise in support of Ardent Sentry in Varnville, S.C., May 19, 2013. Conway is a chemical operations specialist assigned to the 108th Chemical Company, South Carolina Army National Guard. U.S. Army National Guard photo by Sgt. Erica Knight

A Standard Missile-3 Block 1B interceptor missile is launched from the guided-missile cruiser USS Lake Erie during a Missile Defense Agency and U.S. Navy test in the Pacific Ocean, May 16, 2013. The SM-3 Block 1B successfully intercepted a target missile that had been launched from the Pacific Missile Range Facility at Barking Sands in Kauai, Hawaii. Lake Erie detected and tracked the target with its onboard AN/SPY-1 radar. U.S. Navy photo

Soldiers take cover as a grenade explodes in an enemy bunker during exercise Bronco Rumble on Schofield Barracks, Hawaii, May 9, 2013. U.S. Army photo by Sgt. Brian Erickson

Soldiers move toward an enemy objective during exercise Bronco Rumble on Schofield Barracks, Hawaii, May 9, 2013. U.S. Army photo by Sgt. Brian Erickson

Marine Corps Sgt. Maj. Bryan B. Battaglia, senior enlisted advisor to the chairman of the Joint Chiefs of Staff, joins the services' senior enlisted advisors in paying respects during an Armed Forces Day wreath-laying ceremony at the Tomb of the Unknowns in Arlington National Cemetery in Arlington, Va., May 18, 2013. DOD photo by U.S. Army Staff Sgt. Sun L. Vega

Marine Corps Sgt. Maj. Bryan B. Battaglia, senior enlisted advisor to the chairman of the Joint Chiefs of Staff, join senior enlisted advisors representing each service branch for an inaugural wreath-laying ceremony to mark Armed Forces Day at the Tomb of the Unknowns in Arlington National Cemetery, Va., May 18, 2013. DOD photo by U.S. Army Staff Sgt Sun L. Vega