Airmen strengthen forward capability in Bulgaria
A distance marker is held in position on an unimproved surface during an austere landing exercise at Plovdiv, Bulgaria, Feb. 9, 2016. The colorful markers were put in place by 321st Special Tactics Squadron combat controllers and are used as a visual reference point to aid pilots when landing on unmarked surfaces. (U.S. Air Force photo by Airman 1st Class Luke Kitterman/Released)

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