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U.S. Air Force Staff Sgt. Samuel Zink, 844th Communications Squadron executive travel communicator, left, performs pull-ups during the Murph Challenge at Joint Base Andrews, Maryland, June 5, 2026. Participants had to complete many physical challenges, including 100 pull-ups with the option of wearing a weighted vest. (U.S. Air Force photo by Airman 1st Class Kiora Brooks)