Retirement ceremony for Chief Master Sgt. Richard Johnston Published April 13, 2010 VANCE AIR FORCE BASE, Okla. -- Congratulations and good luck on your retirement Chief Master Sgt. Richard Johnston. Thank you for your service. Time in service: 30 years active duty and three years Reserves Retirement ceremony: 2 p.m., Friday, April 23, at the Vance Collocated Club. A reception will follow the ceremony in the enlisted lounge.