Air Force Gen. Philip M. Breedlove, NATO’s supreme allied commander for Europe and commander of U.S. European Command, provides a command update during a news conference at the Pentagon, June 30, 2014. DOD photo by Glenn Fawcett

Navy seamen from the Firefighting Damage Control School on Naval Base San Diego fight a simulated flight deck fire during a training exercise in San Diego, June 26, 2014. U.S. Navy photo by Petty Officer 1st Class Jacob L. Dillon

U.S. sailors and Marines participate ibn a safety stand down on the flight deck of the USS Bataan in the Mediterranean Sea, June 21, 2014. The Bataan, with elements of the 22nd Marine Expeditionary Unit, is operating in the U.S. 6th Fleet area of responsibility to augment U.S. crisis response forces in the region. U.S. Navy photo by Petty Officer 3rd Class Mark Hays

Air Force Airman 1st Class Vincent Hale examines an A-10 Thunderbolt II aircraft during RED FLAG-Alaska 14-2 on Joint Pacific Alaska Range Complex, Alaska, June 20, 2014. Hale, an aircraft maintainer, is assigned to the 51st Aircraft Maintenance Squadron, Osan Air Base, South Korea. U.S. Air Force photo by Senior Airman Ashley Taylor

The U.S. Air Force Thunderbirds perform precision stunts during the Warriors Over the Wasatch Air Show on Hill Air Force Base, Utah, June 28, 2014. U.S. Air Force photo by Airman 1st Class Taylor Queen

U.S. soldiers detonate a mine clearing line charge during a combined arms live-fire exercise at the Joint Multinational Readiness Center in Hohenfels, Germany, June 26, 2014. The soldiers, combat engineers, are assigned to the 1st Cavalry Division's Company B, 91st Brigade Engineer Battalion, 1st Brigade Combat Team. U.S. Army photo by Capt. John Farmer

U.S. soldiers detonate a mine clearing line charge during a combined arms live-fire exercise at the Joint Multinational Readiness Center in Hohenfels, Germany, June 26, 2014. The soldiers, combat engineers, are assigned to the 1st Cavalry Division's Company B, 91st Brigade Engineer Battalion, 1st Brigade Combat Team. U.S. Army photo by Capt. John Farmer

President Barack Obama renders honors during the evening parade at Marine Barracks Washington, D.C., June 27, 2014. The president and First Lady Michelle Obama joined Marine Corps Commandant Gen. James F. Amos and his wife, Bonnie, for the performance, which featured the "Commandant's Own" U.S. Marine Drum and Bugle Corps. U.S. Marine Corps photo by Staff Sgt. Oscar L. Olive IV