Passengers depart from a U.S. Air Force C-17 Globemaster III and make their way to McMurdo Station, Antarctica, during Operation Deep Freeze (ODF), July 15, 2016, at Pegasus Ice Runway. ODF is a joint operation between the U.S. Air Force, the National Science Foundation, and the Royal New Zealand Air Force. (U.S. Air Force Reserve photo by Staff Sgt. Madelyn McCullough)