Chief Petty Officer Troy Shrum, of the Coast Guard Cutter Healy deck department, pulls the end of a line while in front of the icebreaker on the Arctic Ocean, Sept. 13, 2013. After many days of work for a simulated oil spill response exercise, the crew and passengers of the Healy enjoyed a couple hours of liberty on a safe patch of frozen Arctic Ocean ice. (U.S. Coast Guard photo by Petty Officer 3rd Class Grant DeVuyst)