Saber Nation Welcomes New Group Commanders Published Aug. 8, 2013 By Airman 1st Class Gustavo Castillo 52nd Fighter Wing Public Affairs SPANGDAHLEM AIR BASE, Germany -- Below is a listing of group-level changes of command held from May through fall 2013 for units in the 52nd Fighter Wing: 52nd Operations Group - U.S. Air Force Col. Robert P. Winkler assumed command from U.S. Air Force Col. David Lyons June 28, 2013. 52nd Mission Support Group - U.S. Air Force Col. Nathan A. Rump assumed command from U.S. Air Force Col. Scott Calisti July 1, 2013. 52nd Munitions Maintenance Group - U.S. Air Force Col. Mark E. Bowen assumed command from U.S. Air Force Col. Matthew W. Flood July 9, 2013. 52nd Medical Group - U.S. Air Force Col. Jill Scheckel assumed command from U.S. Air Force Col. Robert Bowersox July 26, 2013.