621st ACS Change of Command Published May 18, 2021 By Staff Sgt. Douglas Lorance 51st Fighter Wing Public Affairs OSAN AIR BASE, Republic of Korea -- 621st Air Control Squadron held a change of command ceremony at Osan Air Base, Republic of Korea, May 17, 2021. Lt. Col. Jonathan Kind transferred command of the 621st ACS to Lt. Col. Megan Luka