51st Medical Group Change of Command Published July 12, 2021 By Tech. Sgt. Nicholas Alder 51st Fighter Wing Public Affairs OSAN AIR BASE, Republic of Korea -- The 51st Medical Group held a change of command ceremony at Osan Air Base, Republic of Korea, July 12, 2021. Col. Michael Fea transferred command of the 51st MDG to Col. Jennifer Vecchione.