Nov. 15, 2016 IMA program lets crew chief in on ground floor of KC-46 program When Air Force leaders announced the KC-46A aerial refueler was in the works, Senior Master Sgt. Constantine Karamargin wanted to get involved in the development process.But first he had to find a way into the program.With over 20 years as a crew chief on the KC-10 Extender and as a long-time