Army Spc. Greg Hadley enters a building as the rear man during a situational training exercise on Joint Base Elmendorf-Richardson, Alaska, July 24, 2013. Hadley, a military policeman, is assigned to the 164th Military Police Company, 2nd Engineer Brigade. U.S. Air Force photo by Justin Connaher

U.S. Army Spc. Carlos Tapia checks a crew system equipped with a machine gun before convoy operations on Kandahar Airfield, Afghanistn, July 30, 2013. Tapia is assigned to Alpha Troop, Regimental Support Squadron, Combined Force Dragoon, which provided security during the operation. U.S. Army photo by Spc. Joshua Edwards

Defense Secretary Chuck Hagel answers questions from reporters on the Strategic Choices Management Review during a press briefing at the Pentagon, July 31, 2013. Navy Adm. James A. Winnefeld Jr., vice chairman of the Joint Chiefs of Staff, joined Hagel for the briefing. The review describes the impact of further budget reductions on the Defense Department and identifies options to deal with the additional cuts. DOD photo by Glenn Fawcett

Defense Secretary Chuck Hagel answers questions from reporters on the Strategic Choices Management Review during a press briefing at the Pentagon, July 31, 2013. Navy Adm. James A. Winnefeld Jr., vice chairman of the Joint Chiefs of Staff, joined Hagel for the briefing. The review describes the impact of further budget reductions on the Defense Department and identifies options to deal with the additional cuts. DOD photo by Glenn Fawcett

U.S. Army Sgt. 1st Class Jeremy Carver emerges from a red plume of smoke during an urban assault while competing in the national Best Warrior Competition in Little Rock, Ark., July 24, 2013. The competition evaluated soldiers on a wide range of field exercises and individual Army warrior tasks. Carver is assigned to Company B, Recruiting and Retention Battalion, Oregon Army National Guard. DoD photo by U.S National Guard Sgt. Betty Boyce

A German army sergeant first class observes U.S. Army Spc. Robert Hart while firing the German MG3 machine gun during qualification for the Schuetzenschnur, the German marksmanship badge, at the Grafenwoehr Training Area in Germany, July 30, 2013. Hart is assigned to the Joint Multinational Training Command. U.S. Army photo by Gertrud Zach

The amphibious assault ship USS Wasp conducts regularly scheduled training on a cloudy night in the Atlantic Ocean, July 28, 2013. U.S. Navy photo by Seaman Michael T. Forbes II

U.S. Navy Petty Officers 3rd Class Jaime Ziegler, left, and Darin Lesley perform routine maintenance on an MH-60S sea hawk helicopter in San Diego, July 29, 2013. The squadron provides armed helicopter capability for the U.S. 5th and 7th fleets. It also provides detachments to various commands covering logistics, search and rescue and humanitarian assistance. Ziegler and Lesley are assigned to Helicopter Sea Combat Squadron 21. U.S. Navy photo by Seaman Bryan Jackson