21st OG change of command
PETERSON AIR FORCE BASE, Colo. – Col. Chris Crawford (left), 21st Space Wing commander, passes command of the 21st Operations Group to Col. David Miller June 26 at building 2027. Miller replaces Lt. Col. Paul Tombarge, outgoing 21st OG commander. Prior to taking command of the 21st OG, Miller was a student at the National War College. (U.S. Air Force photo/Robb Lingley)