Film looks like it is from the mid 1960s. Covers one of the greatest construction and engineering feats ever undertaken – the missile and manned bomber early warning system set up in far away places such as Clear, Alaska, Thule Greenland and Fylingdales, UK. The United States Air Force Ballistic Missile Early Warning System (BMEWS) was the first operational ballistic missile detection radar. The original system was built in 1959 and could provide long-range warning of a ballistic missile attack over the polar region of the northern hemisphere. They also provided satellite tracking data. The three facilities operated their original 1950s vintage radars for more than four decades, but all have been upgraded with more modern phased array radars. The facility at Clear Air Force Station was the last to be upgraded, and now operates a PAVE PAWS radar that was moved from Texas in 2001.[3] Information received from the BMEWS radars is forwarded to Cheyenne Mountain Air Station, Colorado where it is coordinated with data from other sensors, including other Pave PAWS sites.