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Members of the U.S. military, Royal Australian Air Force, and Japan Air Self-Defense Force stand in formation to start Exercise Cope North 20 (CN20), at Andersen Air Force Base, Guam, Feb. 12, 2020. CN20 is an annual trilateral field training exercise conducted at Andersen AFB, and around the Commonwealth of the Northern Mariana Islands (CNMI), Palau, and Yap in the Federated States of Micronesia.