The Oklahoma History Center (OHC), in association with Villages of OKC, Humana Market Point and Oklahoma Warriors Honor Flight, is proud to host a pinning ceremony honoring all the servicemen and servicewomen, active or reservists, who served anywhere in the world during the Vietnam War era - the period of Nov. 1, 1955, to May 15, 1975. The event will be held in the Devon Great Hall of the OHC on Tuesday, March 29, from 10:30 a.m. to noon. This event is free and open to the public.