In April, two scientists surveying the Greenland Ice Sheet found Camp Century, a Cold War U.S. military base while attempting to map the ice sheet ... The U.S. Army Corps of Engineers removed ...

The camp was made up of 21 tunnels, spanning a total length of 9,800 feet. Officially, it was a research facility run by the U.S. Army Corps ... a more detailed map of the base to be revealed ...