Mid-Canada Line: AERIAL SHOTs of site of stations. Shot of large helicopter lowering crates to ground. Sequence on electronic technicians working on complicated circuits. TILT UP microwave tower. Shots of dials, controls, components of generator room. TILT UP tower. [Remark: Mid-Canada Line, also known as the McGill Fence was a series of military sites designed to function as the second line of detection. Situated between the DEW Line and the Pinetree Line, its purpose was to detect enemy aircraft that had penetrated south of the DEW Line into the heart of North America. Conceived during the "Cold War" in 1951 it wasn't until January of 1958 that the line became fully operational.]