There is a secret staircase hidden in the Capitol dome, and it goes all the way to the top. Follow Tech Insider: On Facebook More from Innovation Thousands of people tour the US Capitol every year.

The Missouri Capitol dome will shine purple today in recognition of Alzheimer's Awareness Day. Gov. Mike Kehoe ordered the dome to shine purple from sunset today until sunrise Wednesday ...

Gov. Mike Kehoe ordered the Missouri State Capitol dome to be lit purple Tuesday night in honor of Missouri Alzheimer's Awareness Day. The dome lighting hopes to raise awareness around the disease ...

The dome of the Missouri State Capitol will be lit purple on Tuesday, March 11, for Missouri Alzheimer’s Awareness Day.