Check out this amazing building in Silver Spring, Maryland! Built in 1927, the National Guard Armory is still standing today. Take a look at the photo and map to learn more about this amazing structure.

Learn the incredible story of how Frederick Douglass, then U.S. Marshal of Washington, D.C., saved Tom Smothers from a near-lynching in 1880. Read an excerpt from John Muller's book to learn more.