THULE AIR BASE, Greenland – Col. Todd Moore, 21st Space Wing commander, passes the guidon to Col. Mafwa Kuvibidila, 821st Air Base Group commander, during the 821st Air Base Group change of command ceremony, June 28, 2018, at Thule Air Base, Greenland. Kuvibidila was the commander of the 20th Space Control Squadron, Eglin Air Force Base, Florida from June 2014 to June 2016. (U.S. Air Force photo by Staff Sgt. Emily Kenney)