Marine Corps Sgt. Maj. Bryan Battaglia, senior enlisted advisor to the chairman of the Joint Chiefs of Staff, speaks at...

U.S. Deputy Defense Secretary Bob Work, second from left, meets with Pakistani Minister of State Tariq Fatemi, right,...

U.S. Defense Secretary Ash Carter speaks to multinational troops in Irbil, Iraq, July 24, 2015. Carter made an...

Soldiers rappel from a 100-foot tower during a sapper leader course on Camp San Luis Obispo in San Luis Obispo County,...

U.S. Defense Secretary Ash Carter, right, observes as soldiers train at the counterterrorism training area in Baghdad,...

U.S. Army Sgt. Sean Fitzgibbons, right, re-enlists before a joint airborne jump at a drop zone in Nurmsi, Estonia, July...

Marine Corps Sgt. Donald Jackson trains enlistees in Yakima, Washington, July 17, 2015. Jackson is a drill instructor...

U.S. Defense Secretary Ash Carter and Gen. Taleb Shegati al-Kenani, commander of Iraq's counterterrorism forces,...

A U.S. Air Force CV-22B Osprey gives a demonstration of its capabilities during the Royal International Air Tattoo on...

Members of the Thunderbirds, the Air Force’s aerial demonstration team, fly over Niagara Falls in New York, July 20,...