The disabled fishing vessel Antarctic Chieftain is towed astern of the Coast Guard Cutter Polar Star through sea ice near Antarctica, Feb. 14, 2015. Polar Star's crew will tow Antarctic Chieftain to the safety of open water. Polar Star's crew has been underway in Antarctica in support of Operation Deep Freeze 2015, part of the U.S. Antarctic Program, managed by the National Science Foundation. (U.S. Coast Guard photo by Petty Officer 1st Class George Degener)