Staff Sgt. Crystal McKerracher, a 68th Airlift Squadron flight engineer, shows students from the Inter-American Air Forces Academy the tail compartment of the C-5M Super Galaxy aircraft March 29, 2017 at Joint Base San Antonio-Lackland, Texas. As part of their tour the students also toured the structural, metals, survival, and engine shops. (U.S. Air Force photo by Benjamin Faske)