Crew members of the Coast Guard Cutter Mackinaw prepare to offload one of 1,200 Christmas trees at Navy Pier in Chicago, Dec. 2, 2017. The Mackinaw served as the Christmas Tree Ship while Coast Guard personnel partnered with Chicago's maritime community for the 18th consecutive year, reenacting the tradition of the original Chicago Christmas Tree Ship which brought trees to Chicago from northern Michigan for needy families more than 100 years ago. (U.S. Coast Guard photo by Master Chief Petty Officer Alan Haraf)