Maintenance Training Tina McCorkindale, president and CEO of the Institute for Public Relations and a participant in Joint Civilian Orientation Conference 91, takes part in maintenance training at Nellis Air Force Base, Nev., June 26, 2019. JCOC is the Defense Department’s oldest and most prestigious public liaison program. Established in 1948, it is the only secretary of defense-sponsored outreach program that enables American business and community leaders to have a full immersive experience with their military. SHARE: Download: Full Size (0.98 MB) Tags: jcoc, Air Force Credit: DOD VIRIN: 190626-D-ZZ999-115.JPG Photo Gallery