Soldiers from the 1st Battalion, 501st Parachute Infantry Regiment, 4th Infantry Brigade Combat Team (Airborne), 25th Infantry Division, U.S. Army Alaska, conduct training with the M3 Carl Gustaf 84mm recoilless rifle Sept. 6, 2018, at Joint Base Elmendorf-Richardson, Alaska. (Jamal Wilson/Air Force)
The Wasp-class amphibious assault ship USS Iwo Jima (LHD 7) transits the Alvund Fjord, Oct. 31, 2018, while participating in Trident Juncture 2018, a NATO-led exercise designed to certify NATO response forces and develop interoperability among participating NATO-allied and partner nations. (MC3 Joe J. Cardona Gonzalez/Navy)
A U.S. sailor stands by to operate a decontamination station Oct. 22, 2018, as part of a mass casualty drill simulating a chemical, biological, radiological and nuclear incident on the amphibious assault ship USS Wasp (LHD 1) in the East China Sea. (MC1 Daniel Barker/Navy)
Soldiers conduct a combatives demonstration at the Airborne and Ranger Training Brigade ranger graduation at Fort Benning, Ga., Oct. 26, 2018. (Patrick A. Albright/Army)
Aviation Machinist's Mate Airman Jadah Martinez inspects an after burner for fuel leaks Oct. 26, 2018, during an active test on the fantail aboard the Nimitz-class aircraft carrier USS Harry S. Truman (CVN 75) in the Norwegian Sea. (MC3 Victoria Granado/Navy)
Cpl. Daniel Divirgilio fires a M249 Light Machine Gun at a target Oct. 24, 2018, during a fire and movement range at Camp Hansen, Okinawa, Japan. (Lance Cpl. Terry Wong/Marine Corps)
Gen. Robert Neller, commandant of the U.S. Marine Corps, chats with Marines on Oct. 30, 2018, at an event held during Exercise Trident Juncture 2018. (NATO)
U.S. Air Force KC-135 Stratotanker aircrew conduct a preflight brief before takeoff during Exercise Trident Juncture 18 from Rovaniemi, Finland, Oct. 29, 2018. Exercise Trident Juncture is the largest NATO exercise since 2002, including 31 countries and more than 50,000 military members. (Senior Airman Luke Milano/Air Force)
Paratroopers assigned to the 4th Infantry Brigade Combat Team (Airborne), 25th Infantry Division, U.S. Army Alaska, conduct an airborne operation on Malemute drop zone after jumping from CH-47 Chinook helicopters at Joint Base Elmendorf-Richardson, Alaska, Nov. 1, 2018. (Justin Connaher/Air Force)
Paratroopers from Alpha Battery, 1st Battalion, 319th Airborne Field Artillery Regiment, 3rd Brigade Combat Team, 82nd Airborne Division sight in an M1193A Howitzer during an air assault and live-fire exercise held Oct. 24, 2018, on Fort Bragg, N.C. (Army)
