Crewmembers from the Coast Guard Cutter Polar Star, along with members of the Christchurch City Council and the New Zealand Fire Service, perform community service Saturday, Dec. 30, 2017, in Christchurch, New Zealand, tending to trees planted there following a February 2017 wildfire. The crew of the Seattle-based Polar Star visited New Zealand on its way to Antarctica in support of Operation Deep Freeze 2018, the U.S. military’s contribution to the National Science Foundation-managed U.S. Antarctic Program. U.S. Coast Guard photo by Chief Petty Officer Nick Ameen.