This March 22, 2019, file photo shows Mount Rushmore in Keystone, South Dakota. An "unhealthy" air quality zone covered parts of South Dakota and Nebraska on Monday. This March 22, 2019 ...

The creation of Mount Rushmore is a story of struggle — and to some, desecration. The Black Hills are sacred to the Lakota Sioux, the original occupants of the area when white settlers arrived.