Three pilots were killed in January 2013 when their Twin Otter plane, owned by Canadian airline Kenn Borek Air, crashed into the slope of one of the highest peaks of Antarctica.
The bodies of 55-year-old Bob Heath from Inuvik, North Carolina, 36-year-old Perry Andersen from Collingwood, Ontario, and 25-year-old Mike Denton from Calgary remain on Mount Elizabeth, buried under the wreckage of the plane in which they died.