Image 0 of 5German airmen assigned to Surface Air and Missile Defense Wing 1 fire the LeFlaSys Ozelot weapon system at the NATO Missile Firing Installation (NAMFI) during Artemis Strike Nov. 7, 2017, in Chania, Greece. Artemis Strike is a German-led multinational air defense exercise. (Army) A Marine yells orders to his squad members during an Integrated Training Exercise. (Marine Corps) A U.S. Navy sailor signals Landing Craft, Air Cushion 83, to embark on the amphibious assault ship USS Iwo Jima (LHD-7) as part of a Composite Training Unit Exercise (COMPTUEX) at Onslow Beach. (Staff Sgt. Dengrier M. Baez/Marine Corps) Boatswain's Mate 3rd Class Anthony Henry stands watch in the pilot house during a general quarters drill aboard the Arleigh Burke-class guided-missile destroyer USS Oscar Austin (DDG 79). (Ryan Utah Kledzik/Navy) U.S. Army Chief Warrant Officer 3 Kaylan Harrington, an Afghan National Army Special Operations Advisory Group mentor, plays with children while assisting at a medical clinic in Kabul, Afghanistan, Nov. 6, 2017. (Senior Airman Sean Carnes/Air Force)