Thousands of people tour the US Capitol every year. Very few get a first-hand look inside the building's most iconic feature. There is a secret staircase hidden in the Capitol dome, and it goes ...

You can fool the governor with a trick that engineers used to build the United States Capitol dome. The U.S. Capitol dome is really an illusion. It's actually a thin shell. And the structure that ...

Thousands of people tour the US Capitol every year. Very few get a first-hand look inside the building's most iconic feature. There is a secret staircase hidden in the Capitol dome, and it goes ...