From left, Col. Joseph Rushlau, 100th Maintenance Group commander, hands the 100th Aircraft Maintenance Squadron guidon to Maj. Rofelio Grinston, incoming 100th AMXS commander, during the 100th AMXS change of command ceremony June 18, 2013, on RAF Mildenhall, England. Grinston previously served as the 6th Maintenance Operations Squadron commander, at MacDill Air Force Base, Fla., providing financial, administrative, facility, quality assurance, contractual analysis, scheduling, engine management, and computer network support for 16 KC-135 Stratotankers and three C-37A aircraft. (U.S. Air Force photo by Airman 1st Class Preston Webb/Released)