North South Polar's chief scientist, Alberto Behar, left, signals to an Air Greenland helicopter pilot to hoist a sling load of 55-gallon barrels of fuel as safety team leader John Bradley steadies them near Koge Bay, Greenland, Aug. 7, 2013. The crew flew to the island where they conducted 18 sling loads of 55-gallon barrels of fuel destined for the excavation site during the mission to locate a missing World War II U.S. Coast Guard J2F-4 Grumman Duck aircraft. (U.S. Coast Guard photo by Joe Tuttle)