180923-M-ON629-1052 ANDERSON AIR FORCE BASE, Guam (Sept. 23, 2018) Naval Aircrewman (Operator) 3rd Class Jonathan Ziminski, assigned to Patrol Squadron (VP) 45, views a sink exercise, during exercise Valiant Shield 2018, onboard Andersen Air Force Base, Guam, Sept. 23, 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/Released)