Theater tickets from the night Lincoln was assassinated just sold for $262,500
Malcolm X's daughter says schools should teach that 'American history is Black history'
Efforts have resumed to replace Andrew Jackson's image with Harriet Tubman's on $20 bills
Archaeologists find hidden tunnels under Alcatraz prison not from escapees
Why the American flag is reversed on military uniforms
Replicas of Christopher Columbus' ships Nina and Pinta docking in Louisville
