As the threat of nuclear war loomed during the Cold War, the U.S. Army hatched a top secret plan to conceal hundreds of missile launchers on rail lines hidden beneath the thick ice sheets of Greenland ...

Giant vehicles were used to transport supplies to Camp Century, a U.S. military base in Greenland, shown in June 1959. (Pictorial Parade/Getty Images) As the threat of nuclear war loomed during the ...