Analysis of information sources in references of the Wikipedia article "Mount Rushmore" in English language version.
1941, the original mockup of Mt. Rushmore before funding ran out
Mount Rushmore Natl Meml
A variety of films and television shows suggest Mount Rushmore's use as a secret hideout for the government such as in "National Treasure: Book of Secrets" and "Team America: World Police."
1941, the original mockup of Mt. Rushmore before funding ran out