U.S. Marine Corps Sgt. James Morris, a fixed-wing aircraft

U.S. Marine Corps Sgt. James Morris, a fixed-wing aircraft mechanic with Marine Fighter Attack Squadron (VMFA) 121, and Lt. Col. Richard Rusnok, commanding officer of VMFA-121, conduct pre-flight checks during Exercise Valiant Shield 18 at Iwo To, Japan, Sep. 18, 2018. Valiant Shield is a biennial, U.S. only, field training exercise (FTX) with a focus on integration of joint training among U.S. forces in relation to current operational plans. This training enables real-world proficiency in sustaining joint forces through detecting, locating, tracking and engaging units at sea, in the air, on land, and in cyberspace in response to a range of mission areas. (U.S. Marine Corps photo by Lance Cpl. Seth Rosenberg)