The C-5 Air Conditioning and Pressurization Systems Trainer, panels 1 and 2, have been reconfigured to replicate the current C-5M Super Galaxy system for a classroom environment Feb. 20, 2019, at the 373rd Training Squadron, Detachment 3, on Dover Air Force Base, Del. The AC & PST allows students to see and hear components move when switches are moved on the flight engineer’s control panel. (U.S. Air Force photo by Roland Balik)