A Soldier does as many situps as possible during The Black Knight Challenge at Bagram Air Field, Afghanistan Sept. 17. They had to perform as many situps as possible within a four-minute window. The catch was that only one person could do them at a time. (Photo by Staff Sgt. Michael K. Selvage, 10th Sustainment Brigade Public Affairs NCO)(Released) The situps 140917-A-CA521-167

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Size: 1940px × 1289px
Photo credit: © PJF Military Collection / Alamy / Afripics
License: Licensed
Model Released: No

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