An 82-inch monitor displays an interactive schematic of the C-5M environmental and pressurization system Feb. 20, 2019, at the 373rd Training Squadron, Detachment 3, on Dover Air Force Base, Del. The schematic, which is controlled by a handheld Interactive Multimedia Instruction tablet, allows an instructor to train students on the C-5 Air Conditioning and Pressurization Systems Trainer by monitoring actions, inputting malfunctions and simulating on-the-ground or inflight scenarios. (U.S. Air Force photo by Roland Balik)