Airmen with the 319th Civil Engineer Squadron work together to level out a tilt switch on a precision approach path indicator May 22, 2019, during exercise Summer Viking 19-01 at the Air National Guard Base in Fargo, North Dakota. The PAPI, an airfield lighting system, is crucial for all flight lines in order to assist incoming pilots to see which angle to land at. (U.S. Air Force photo by Senior Airman Elora J. Martinez)
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