Col. Kirk Gibbs, commander of the U.S. Army Corps of Engineers Los Angeles District joined Brig. Gen. Steven J. Bleymaier, commander, Ogden Air Logistics Complex, Hill Air Force Base, Utah, and Tim Gray, deputy director, 309th Aerospace Maintenance and Regeneration Group, to cut the ribbon officially opening the 309 AMARG hangar at Davis-Monthan Air Force Base in Tucson Dec. 7.