sentences:  It was built and publicly promoted as being a base for scientific research, but decades later the facts were discovered that in actuality that was the cover story for Project Iceworm to install sites for launching nuclear missiles in Greenland, a project which was kept secret even from the host nation of Denmark.Powered by a nuclear reactor, the camp operated from 1959 until 1967.The base consisted of 21 tunnels with a total length of .