U.S. Coast Guard crew members load supplies for delivery to Tinian and Saipan for Operation Christmas Drop at Naval Base Guam, Dec. 18, 2015. Operation Christmas Drop is the longest-running humanitarian airlift operation in the world, and the longest ongoing U.S. military operation. In addition to delivering critical supplies and holiday gifts to the people of the Pacific Islands, Christmas Drop trains U.S. service members to airlift material to remote locations. U.S. Navy photo by Petty Officer 1st Class Ace Rheaume