310th Space Wing commander Col. Karen Rizzuti passes the 310th Aerospace Medicine Flight guideon to Lt. Col. David Schaefer during a change of command ceremony on Mar. 8. Colonel Schaefer succeeds Lt. Col. John Langell. The event took place at the 50th Space Wing headquarters at Schriever Air Force Base, Colo. (U.S. Air Force photo by Tech. Sgt. Scott P. Farley)