Staff Sgt. Mark Trejo, the 3rd Infantry Division Sustainment Brigade provost marshal noncommissioned officer in charge on Fort Stewart, demonstrates proper building clearing techniques during the brigade’s security platoon training on Oct. 2, 2017. (Spc. Elizabeth White/Army)
Aviation Structural Mechanic Airman Tate Kern, left, and Airman Tristain Smith clean pad eyes aboard the flight deck of the aircraft carrier USS Nimitz (CVN 68), Oct. 3, 2017, in the Persian Gulf. (MC3 Ian Kinkead/Navy)
Gen. Robert B. Neller, commandant of the Marine Corps, addresses Marines with Special Purpose Marine Air-Ground Task Force-Crisis Response-Africa after a transfer of authority ceremony at Morón Air Base, Spain, Oct. 1, 2017. (Cpl. Jodson B. Graves/Marine Corps)
An F-16 Fighting Falcon assigned to the 480th Fighter Squadron takes off for a night training mission at Spangdahlem Air Base, Germany, Sept. 28, 2017. (Staff Sgt. Jonathan Snyder/Air Force)
U.S. Navy Explosive Ordnance Disposal Technicians, assigned to Explosive Ordnance Disposal Mobile Unit (EODMU) 5, and Sri Lanka Navy divers, conduct diving operations during the first-ever Cooperation Afloat Readiness and Training (CARAT) at the Naval Base in Trincomalee, Sri Lanka, Oct. 5, 2017. (MC1 Arthurgwain L. Marquez/Navy)
New 82nd Airborne Division paratroopers wear maroon berets for the first time during the Airborne Integration Course beret-donning ceremony, Oct. 5, 2017, at Fort Bragg, N.C. (Sgt. Paige Behringer/Army)
U.S. Marine 2nd Lt. Daniel Genter III, left, platoon commander for 1st platoon, Lima Company, 3rd Battalion 5th Marines, 31st Marine Expeditionary Unit, and Staff Sgt. Oscar Mena, platoon sergeant with Lima Co. BLT 3/5, 31st MEU, observe the objective during a helicopter raid at Colonel Ernesto Rivera Air Base, Philippines, on Oct 8, 2017. (Lance Cpl. Garett Burns/Marine Corps)
Cryptologic Technician (Technical) 2nd Class Maxwell Gavcus heaves in line aboard the Arleigh Burke-class guided-missile destroyer USS Oscar Austin (DDG 79) on Sept. 30, 2017, as the ship arrives in Eckernforde, Germany, for a port visit. (MC2 Ryan Utah Kledzik/Navy)
U.S. Air Force 353rd Special Operations Support Squadron Deployed Aircraft Ground Response Element Airmen, await treatment of simulated injuries during a mass casualty exercise on Oct. 3, 2017, at Camp Hansen, Japan. (Master Sgt. Bon Strout/Air Force)
A U.S. Marine Corps crew chief assigned to Special Purpose Marine Air-Ground Task Force-Crisis Response-Africa rides aboard a MV-22C Osprey aircraft near Asturias, Spain, Sept. 28, 2017. (Sgt. Takoune H. Norasingh/Marine Corps)
U.S. soldiers with the 1st Cavalry Squadron, 91st Cavalry Regiment, currently deployed to Latvia, conduct mass casualty training at Adaži training grounds on Sept. 25, 2017. (U.S. Navy photo by Lt. j.g. Rob Kunzig/Navy)
A drill instructor from Fox Company, 2nd Recruit Training Battalion, instructs a recruit to move faster during pick up at Marine Corps Recruit Depot San Diego, Sept. 22, 2017. (Cpl. Angelica Annastas/Marine Corps)
A U.S. Air Force C-130 Hercules aircraft assigned to the 130th Airlift Wing, McLaughlin Air National Guard Base, Charleston, W.Va., awaits takeoff to deliver supplies to Puerto Rico, Oct. 5, 2017, at Savannah Air National Guard Base, Savannah, Ga. (Tech. Sgt. De-Juan Haley/Air National Guard )
From the left: T.V. Johnson, United States Mint's director of corporate communication; Terry Hamby, chair of the United States World War I Centennial Commission; and World War I re-enactors pose for a group photo at the Walter E. Washington Convention Center in Washington on Oct. 9, 2017. (Spc. Connor Kelly/ARmy)