Where was The Day the Earth Stood Still (1951) filmed?

1951 US science fiction horror film directed by Robert Wise

The Day the Earth Stood Still (1951) was filmed in Washington, D.C., Century City and Fort George G. Meade, 3 places named in its Wikipedia article's Filming section, in the United States. Wikidata records no filming location for it at all, so the article is the only recorded source. Each place says where its claim comes from.

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