An Airman from the 2nd Security Forces Squadron makes use of a military protractor at Barksdale Air Force Base, Louisiana, Aug. 30, 2021. Military protractors use the metric system for measuring distance and feature compass degrees around the edges. (U.S. Air Force photo by Airman 1st Class William Pugh)

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Photo by: Airman 1st Class William Pugh |  VIRIN: 210830-F-NI018-1120.JPG