Tech. Sgt. Adam Crough, 51st Fighter Wing flight safety manager, left, and Tech. Sgt. Charles Smith, 51st Civil Engineer Squadron contracting officer representative, observe the landing of a small unmanned aircraft system at Osan Air Base, Republic of Korea, June 6, 2021. Members of the 51st Civil Engineer Squadron perform quarterly flights to maintain their SUAS operator proficiency. (U.S. Air Force photo by Tech. Sgt. Nicholas Alder)