Backup (1965)

This footage from the National Aeronautics and Space Administration (NASA) details the practice of planning redundant systems in spacecraft design to guard against equipment failure. Specifically discussed is the Gemini 9 spacecraft, a 1966 manned space flight, the seventh manned Gemini flight, the thirteenth American space flight, and the twenty-third space flight of all time. The Gemini was to dock with the Augmented Target Docking Adaptor (ATDA) depicted in the film. At the time of the filming, NASA was readying the ATDA for launch at Cape Kennedy, Florida.