Arctic: "Top of the World" 1962 US Army; The Big Picture TV-543

more at http://quickfound.net/

'THE BIG PICTURE examines the vitally strategic importance of the Far North. Traveling pictorially from Alaska to the Northwest - across the vast reaches of Canada - and Greenland in the east, it traces the hemispheric defense and terrain which stretches unbroken by national boundaries--across "The Top of the World."'

Originally a public domain film from the National Archives, slightly cropped to remove uneven edges, with the aspect ratio corrected, and one-pass brightness-contrast-color correction & mild video noise reduction applied.

The soundtrack was also processed with volume normalization, noise reduction, clipping reduction, and/or equalization (the resulting sound, though not perfect, is far less noisy than the original).

https://en.wikipedia.org/wiki/Distant_Early_Warning_Line

Wikipedia license: http://creativecommons.org/licenses/by-sa/3.0/

The Distant Early Warning Line, also known as the DEW Line or Early Warning Line, was a system of radar stations in the far northern Arctic region of Canada, with additional stations along the North Coast and Aleutian Islands of Alaska (see Project Stretchout and Project Bluegrass), in addition to the Faroe Islands, Greenland, and Iceland. It was set up to detect incoming Soviet bombers during the Cold War, and provide early warning of any sea-and-land invasion.

The DEW Line was the northernmost and most capable of three radar lines in Canada and Alaska. The first of these was the joint Canadian-US Pinetree Line, which ran from Newfoundland to Vancouver Island just north of the Canadian border, but even while it was being built there were concerns that it would not provide enough warning time to launch an effective counterattack. The Mid-Canada Line (MCL) was proposed as an inexpensive solution using a new type of radar. This provided a "trip wire" warning located roughly at the 55th parallel, giving commanders ample warning time, but little information on the targets or their exact location. The MCL proved largely useless in practice, as the radar return of flocks of birds overwhelmed signals from aircraft.

The DEW Line was proposed as a solution to both of these problems, using conventional radar systems that could both detect and characterize an attack, while being located far to the north where they would offer hours of advanced warning... Advanced site preparation began in December 1954, and the construction was carried out in a massive logistical operation that took place mostly during the summer months when the sites could be reached by ships. The 63-base Line reached operational status in 1957. The MCL was shut down in the early 1960s, and much of the Pinetree line was given over to civilian use.

In 1985, as part of the "Shamrock Summit", the US and Canada agreed to transition DEW to a new system known as the North Warning System (NWS)...

The original DEW line was designed to detect bombers and was unable to detect intercontinental ballistic missiles (ICBMs). To give warning of this threat, in 1958 a more sophisticated radar system was constructed, the Ballistic Missile Early Warning System (BMEWS).

The DEW Line... marked the edge of an electronic grid controlled by the new SAGE (Semi Automatic Ground Environment) computer system and was ultimately centered at the Cheyenne Mountain Complex, Colorado, command hub of the North American Aerospace Defense Command (NORAD).

...The DEW Line grew out of a detailed study made by a group of the nation's foremost scientists in 1952, the Summer Study Group at the Massachusetts Institute of Technology...

The majority of Canadian DEW Line stations were the joint responsibility of the Royal Canadian Air Force (the Canadian Forces) and the U.S. Air Force. The USAF component was the 64th Air Division, Air Defense Command...