Air Force E-3 Sentrys and Navy P-8 Poseidons wait on Andersen Air Force base Guam, in preparation for exercise Valiant Shield 18, Sept. 15, 2018. Valiant Shield is a biennial, only, field training exercise with a focus on integration of joint training among forces. ( Air Force photo by Senior Airman Zachary Bumpus)

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Photo credit: © APFootage / Alamy / Afripics
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Keywords: .., air, biennial, corps, force, guam, joint, marine, navy, shield, training, valiant, vs18