A Marine Corps F-35B Lightning II with Marine Fighter Attack Squadron 121 undergoes pre-flight checks before taking off for a live-fire training exercise on Andersen Air Force Base, Guam, during Valiant Shield 2018 Sept. 16, 2018. Valiant Shield is a biennial, only, field training exercise with a focus on integration of joint training among forces.

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Photo credit: © Bob Collet / Alamy / Afripics
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Keywords: air, america, archive, armed, army, biennial, corps, defence, force, forces, guam, joint, marine, military, navy, reportage, service, serviceman, servicemen, shield, soldier, states, training, united, usa, valiant, vs18