From left to right, Col. Joel Safranek, 436th Airlift Wing commander, listens to Staff Sgt. Damien Allen, 373rd Training Squadron, Detachment 3, C-5M trainer development and subject matter expert, explain the history and process of updating both of the legacy C-5 Air Conditioning and Pressurization Systems Trainers Feb. 20, 2019, at the 373rd Training Squadron, Detachment 3, on Dover Air Force Base, Del. The upgraded AC & PSTs are valued at $5.9 million dollars each and took 12 months to convert to the C-5M Super Galaxy configuration. (U.S. Air Force photo by Roland Balik)