The crew of the Coast Guard Cutter Mackinaw pulls ahead of the barge PML 9000 to expose the pools of open water in front of the barge and assess how to continue to break the ice around the barge after it became stuck in the St. Marys River, Dec. 17, 2013. The crew of Mackinaw freed the barge and both tugs that were escorting it through the St. Marys River.