A cordon with M8 paper, which detects chemical contaminates, is placed near the flightline during an exercise Feb. 21, 2018, at Little Rock Air Force Base, Ark. The cordon was one of many tools used during the exercise to train personnel in measures taken during a contingency operation. (U.S. Air Force photo by Airman 1st Class Grace Nichols)

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Photo by: Airman 1st Class Grace Nichols |  VIRIN: 180221-F-ZF546-1045.JPG