This is one of several short subjects, already in the can, and slated for release by RKO Radio Pictures as part of their RKO-Pathe Specials 1956-1957 season, but which received no theatrical distribution at the time, as a result of the demise of RKO. In 1994, they became part of the TCM library and, for the past 20+ years, finally saw the light of day through occasional airings on cable television.
The DEW (Distant Early Warning) Line was a string of radar stations to detect incoming bombers from the Soviet Union. At its height, the line stretched from Alaska to Iceland. It was in operation from 1957 to 1993. It was replaced by the North Warning System begun in 1988.