374 DS welcomes new commander
YOKOTA AIR BASE, Japan -- Col. Eveline Yao, commander of the 374th Medical Group, passes the unit guidon to Col. Timothy Claseman during the 374th Dental Squadron change of command at Yokota Air Base, Japan, July 27, 2012. The passing of the guidon symbolizes the passing of responsibility, a tradition dating back to Roman times. (U.S. Air Force photo by Staff Sgt. Stacy Moless)