Airmen release balloons at Shaw Air Force Base, S.C., Sept. 20, 2017, during an event honoring prisoners of war and missing in action personnel. The balloons carried POW/MIA individuals' names. Air Force photo by Senior Airman Ashley Maldonado
Marine Corps Sgt. Elvis Nunez looks out at wafting smoke during a simulated raid for the culminating event of Exercise Crocodilo in Metinaro, East Timor, Sept. 13, 2017. Nunez is a rifleman. Marine Corps photo by Lance Cpl. Juan C. Bustos
Air Force firefighters extinguish a fire during training at Barksdale Air Force Base, La., Sept. 14, 2017. The firefighters are assigned to the 2nd Civil Engineer Squadron. Air Force photo by Airman 1st Class Stuart Bright
Army Command Sgt. Maj. Shelita Taylor dons a gas mask during a team-building ruck march in Scottsdale, Ariz., Sept. 16, 2017. Taylor is the command sergeant major of the 400th Military Police Battalion. Army photo by Master Sgt. Michel Sauret
The guided-missile destroyer USS Oscar Austin travels in the Atlantic Ocean, Sept. 14, 2017, during a routine deployment supporting U.S. national security interests in Europe. Navy photo by Petty Officer 2nd Class Ryan Utah Kledzik
Marines travel in a combat rubber raiding craft after exiting the well deck of the USS Bonhomme Richard during an amphibious maritime warfare exercise in the Philippine Sea, Sept. 18, 2017. Navy photo by Petty Officer 3rd Class Zachary DiPadova
Air Force Capt. Keane Carpenter does a safety check of a C-17 Globemaster III aircraft at Scott Air Force Base, Ill., Sept. 10, 2017, before moving hurricane relief supplies to Puerto Rico. Air Force photo by Master Sgt. Joshua L. DeMotts