Duck and Cover - 1952

From Wikipedia: https://en.wikipedia.org/wiki/Duck_and_Cover_(film)
Duck and Cover is a civil defense social guidance film[1] that is often popularly mischaracterized as propaganda. With similar themes to the more adult orientated civil defense training films, the film was widely distributed to United States schoolchildren in the 1950s. It instructionally teaches students on what to do in the event of a nuclear explosion.

The film was funded by the US Federal Civil Defense Administration and released in January 1952. At the time, the Soviet Union was engaged in nuclear testing and the US was in the midst of the Korean War.

The film was written by Raymond J. Mauer, directed by Anthony Rizzo of Archer Productions, narrated by actor Robert Middleton, and made with the help of schoolchildren from New York City and Astoria, New York.

The film is now in the public domain, and is widely available through Internet sources such as YouTube, as well as on DVD. It was selected by the National Film Registry for preservation in 2004.