Good luck visiting the Wall of Spies Experience in Bethesda, Md. The museum is housed inside the National Counterintelligence and Security Center headquarters, one of the most secure buildings in the country, and to get in, you kind of have to be a spy.
Because Wall of Spies Experience in Bethesda, Md., is closed to the public, the National Counterintelligence and Security Center has slowly been bringing the museum online for all to see. Its newest exhibit, which went live last week, focuses on spies during the American Civil War