9/17/2012 - Brig. Gen. Joseph Guastella, 455th Air Expeditionary Wing commander, presents the 455th Expeditionary Operations Group guidon to Col. Michael Millen as Millen assumes command of the group at Bagram Airfield, Afghanistan, Sept. 17, 2012. Millen has extensive experience flying both the A-10 and OA-10 Thunderbolt II airframes. (U.S. Air Force photo/SSgt Jeff Nevison)

9/17/2012 - Brig. Gen. Joseph Guastella, 455th Air Expeditionary Wing commander, returns a salute to Col. Michael Millen after Millen assumes command of the 455th Expeditionary Operations Group at Bagram Airfield, Afghanistan, Sept. 17, 2012. Guastella praised Millen during the ceremony for his expertise in the close-air-support mission as well as his leadership traits. (U.S. Air Force photo/SSgt Jeff Nevison)

9/17/2012 - Col. Michael Millen, 455th Expeditionary Operations Group commander, addresses an audience after assuming command of the group at Bagram Airfield, Afghanistan, Sept. 17, 2012. Millen now leads the team of Bagram Airmen responsible for delivering responsive and precise airpower to coalition forces in Afghanistan. (U.S. Air Force photo/SSgt Jeff Nevison)