Captain Andrew Rast (left) and Lt. Col. J.W. Smith (right), 304th Expeditionary Airlift Squadron C-17 pilots, bring a C-17 to a halt on Pegasus Ice Runway near McMurdo Station, Antarctica July 15, 2016, as part of Operation Deep Freeze. ODF is the military support component of the National Science Foundation-managed U.S. Antarctic Program. U.S. military personal are now trained and ready to support this vital mission year-round despite the austere environment, allowing for additional research to be conducted in Antarctica. (U.S. Air Force Reserve photo by Staff Sgt. Madelyn McCullough)