U.S. Air Force Staff Sgt. Darrell Prior, a Terminal Instrument Procedures (TERPS) specialist with Air Mobility Command, examines a map of Colombia at MacDill Air Force Base, Fla., Feb. 2, 2016. As a whole, the MacDill TERPS office ensures all Defense Department aircraft safely land in Central America, South America, the Caribbean, and Mexico by evaluating the host nation's procedures and applying Air Force criteria. (U.S. Air Force photo illustration by Senior Airman Danielle Quilla)