Service members and civilians attend a 9/11 remembrance ceremony at Bagram Airfield, Sept. 11, 2016. Air Force photo by Capt. Korey Fratini Soldiers conduct an airborne operation at Joint Base Elmendorf-Richardson, Alaska, Aug. 23, 2016, during Exercise Spartan Agoge. The soldiers are paratroopers assigned to the 25th Infantry Division’s 4th Brigade Combat Team (Airborne). Air Force photo by Justin Connaher A Marine Corps MV-22 Osprey aircraft idles on the flight deck of the amphibious assault ship USS Boxer in the Pacific Ocean, Aug. 26, 2016. The Boxer was operating in the U.S. 3rd Fleet area of operations. The Osprey is assigned to the 13th Marine Expeditionary Unit. Navy photo by Petty Officer 3rd Class Michael T. Eckelbecker U.S. Marines with 2nd Light Armored Reconnaissance Battalion, Bravo Company, 2nd Marine Division, prepare for training exercises at Fort Pickett, Virginia, Aug. 29, 2016. The Marines conducted live-fire exercises to maintain unit readiness and tactical proficiency. U.S. Marine Corps photo by Sgt. Rebecca L. Floto, 2d MARDIV Combat Camera A U.S. Marine Corps Color Guard proceeds with their routine during a 9/11 Remembrance Ceremony in Nashville, Tennessee, Sept. 11, 2016. Marine Week Nashville provided an opportunity for the Marine Corps to visit a city that normally doesn't have opportunities to interact with Marines on a regular basis. Photo by Lance Cpl. Cristian Ricardo Fram, a military working dog, jumps over an obstacle during training at Fort Meade, Maryland, Aug. 24, 2016. DOD photo by E.J. Hersom President Barack Obama speaks during a remembrance event at the National 9/11 Pentagon Memorial in Arlington, Virginia, Sept. 11, 2016. The ceremony was to remember and honor those lost Sept. 11, 2001. U.S. Coast Guard photo by Petty Officer 2nd Class Patrick Kelley U.S. Army mortar-men with Headquarters Company, 2nd Battalion, 27th Infantry Regiment, fire the M120 Battalion Mortar System at Albano Training Area, Japan, Sept. 13, 2016, as part of Orient Shield 2016. Orient Shield is an annual bi-lateral training exercise held in Japan. U.S. photo by Spc. Patrick Kirby Navy Petty Officer 3rd Class Brian Evans maintains an AS-3134/UPX, an antenna system, while working aloft during a replenishment involving the USS Dwight D. Eisenhower, the USS Monterey, and the USNS Arctic in the Persian Gulf, Sept. 2, 2016. Navy photo by Petty Officer 3rd Nathan T. Beard Pilots assigned to the Thunderbirds, the Air Force's demonstration squadron, fly over Crater Lake, Oregon, Aug. 29, 2016. The Thunderbirds returned to Nellis Air Force Base, Nevada, after performing at the Airshow and Warrior Expo at Joint Base Lewis-McChord, Washington. Air Force photo by Tech. Sgt. Christopher Boitz