Seaman Patrick O'Grady uses an axe to release towing line passed from the Coast Guard Cutter Polar Star to the fishing vessel Antarctic Chieftain near Antarctica, Feb. 14, 2015. Polar Star's crew will tow the disabled vessel to 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)