SHAW AIR FORCE BASE, S.C. -- Col. Joseph Guastella, 20th Fighter Wing commander, greets Lt. Col. Mark Rose, 20th Aircraft Maintenance Squadron commander, after earning 3,000 sortie hours in an F-16CJ here Friday, Dec. 12. Colonel Guastella returned from Nellis AFB with part of the 77th Fighter Squadron where they were participating in the Weapons Instructor Course.(U.S. Air Force photo/Senior Airman Matthew Davis)