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U.S. Marine Corps Cpl. Hunter Buley, Tropospheric Scatter Microwave Radio Terminal operator with Marine Wing Communications Squadron 18 adjusts the radio terminal's trajectory allowing it to receive and transmit data during Valiant Shield 16 at Andersen Air Force Base, Sept. 18, 2016. The radio terminal provided uninterruptable communications between Guam and Tinian. VS16 is a biennial, U.S.-only, field training exercise that focuses on joint training with U.S. Navy, Marine Corps, and Air Force to increase interoperability and working relationships.