U.S. Air Force Tech. Sgt. Sean McGrath, the 35th Operations Support Squadron deputy field manager, tightens the stabilizer bar on the RT3 friction measurement device at Misawa Air Base, Japan, Dec. 7, 2017. The friction of the runway’s surface is measured at all times while the vehicle is running, and any friction change is monitored and recorded onto a tablet inside the car. This allows the 35th OSS to relay all information runway related to be conveyed to pilots in a timely manner for a safe departure. (U.S. Air Force photo by Airman Xiomara M. Martinez)
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