Retirement ceremony for Senior Master Sgt. Keith Morton Published May 13, 2009 VANCE AIR FORCE BASE, Okla. -- Congratulations and good luck Senior Master Sgt. Morton. Thank you for your service. Name: Senior Master Sgt. Keith Morton Time in service: 25 years Retirement ceremony: At 3 p.m., Thursday, May 14, at the Vance Collocated Club. A reception will follow.