Mount Rushmore is not only one of the world's biggest sculptures, it's one of America's most famous tourist destinations. In the process of creating Mount Rushmore, over 450,000 tons (900,000 pounds) of rock were removed from the mountain.
Have you ever wondered how the world's safest car works? Here's an anatomy of the U.S. President's car works, also known as "The Beast".
The Beast is designed to protect the President in any situation....
