Deep Freeze
A Military Sealift Command-chartered container ship, an MV BBC Ems, departs McMurdo Station, Antarctica, on Feb. 13, 2011, after delivering more than 84,000 square feet of vital supplies in support of Operation Deep Freeze. 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.