(Right) Air Force Chief of Staff Gen. David Goldfein watches a demo during the ATLANTIC TRIDENT 17 World War I Remembrance Day at Joint Base Langley-Eustis, Va., April 21, 2017. This year marks the 100th anniversary of the Air Force’s participation alongside the French air force and Royal air force during World War I.

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Photo credit: © Ted Small / Alamy / Afripics
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