A C-17 Globemaster III loadmaster, forward-based with the 304th Expeditionary Airlift Squadron at Christchurch, New Zealand, prepares to airdrop urgently-needed medical supplies near the Amundsen-Scott South Pole Station . The supply drop is part of Operation Deep Freeze and in support of the U.S. Antarctic Program, which is managed by the National Science Foundation. ODF is an annual U.S. Air Force-led mission to lend operational and logistical support to the National Science Foundation's research and exploration in Antarctica. (Courtesy Photo/Chief Master Sgt. Jim Masura)