Lt. Col. John Kelley, 509th Weapons Squadron commander, and Maj. Douglas Murphy, 509th WPS KC-135 Stratotanker instructor pilot, review flight plans on the Nellis Air Force Base flight line Dec. 14, 2016. The 509th WPS, part of the U.S. Air Force Weapons School, flies aerial refueling missions during all of the Weapons School’s integration phases. (U.S. Air Force Photo Susan Garcia)