U.S. Air Force Staff Sgt. Tyson Krug, a boom operator with the 128th Air Refueling Wing, Wisconsin Air National Guard, operates a KC-135R Stratotanker’s boom for an aerial refueling July 7, 2015. The KC-135’s mission was to perform an aerial refueling on the AR-128 East and West Refueling Route in support of U.S. military deploying aircraft. (U.S. Air National Guard photo by Airman 1st Class Morgan R. Lipinski/Released)