Petty Officer 1st Class Andrew Tetrault (left) and Petty Officer 3rd Class Andre Pinault, boatswain's mates assigned to Coast Guard Cutter Alder's navigation division, attach a Christmas tree to Alder's mast before mooring at Chicago's Navy Pier, Dec. 2, 2011. The Alder's crew is delivering more than 750 Christmas trees from northern Michigan to Chicago, to be distributed by different charity groups. U.S. Coast Guard photo by Petty Officer 3rd Class George Degener.