Marine Corps 1st Sgt. Michael Collins, Okinawa Joint Experience instructor, briefs students about the rules for tug-of-war during the Okinawa Joint Fitness Challenge Sept. 26, 2018, at Kadena Air Base, Japan. Service members from the Army, Navy, Air Force and Marine Corps were equally broken up into four classes to provide a joint learning environment.

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Size: 1914px × 1045px
Photo credit: © David Wa / Alamy / Afripics
License: Licensed
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