DescriptionKlaatu - screenshot from trailer for Day the Earth Stood Still.jpg
English: en:The Day the Earth Stood Still is a 1951 science fiction film about an alien and a robot on a diplomatic mission to Earth. This image is a screenshot from a public domain trailer for the film. Trailers for movies released before 1964 are in the Public Domain because they were never separately copyrighted.
Note that it may still be copyrighted in jurisdictions that do not apply the rule of the shorter term for US works (depending on the date of the author's death), such as Canada (70 years p.m.a.), Mainland China (50 years p.m.a., not Hong Kong or Macao), Germany (70 years p.m.a.), Mexico (100 years p.m.a.), Switzerland (70 years p.m.a.), and other countries with individual treaties.