Have you ever wondered why the faces on Mount Rushmore were the presidents chosen to be immortalized? 

References: 

National Park Service
https://www.nps.gov/moru/learn/historyculture/why-these-four-presidents.htm 

US Department of Interior
https://www.doi.gov/blog/mount-rushmore-national-memorial-presidential-tribute 

Britannica
https://www.britannica.com/topic/mount-rushmore-national-memorial 

Wikipedia
https://en.m.wikipedia.org/wiki/mount_rushmore 

National Park Service https://www.nps.gov/articles/kennedyww2.htm 

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