Michael W. Kauffman is author of "American Brutus: John Wilkes Booth and the Lincoln Conspiracies." Here he stands on a tennis court at Fort McNair, the site of the Lincoln conspirators' hanging.
Mike M. Ahlers/CNN
Locals reveal the D.C. you don't know —
Richard Layman, a bike path planner, led the charge to preserve the Washington Coliseum, where the Beatles played their first stage concert in the United States. Layman's blog is "Rebuilding Place in the Urban Space."
Mike M. Ahlers/CNN
Locals reveal the D.C. you don't know —
Susan Lemke, a librarian at the National Defense University, holds a depiction of the Lincoln assassination conspirators' trial, while standing in the restored courtroom in Washington where the trial occurred.
Mike M. Ahlers/CNN
Locals reveal the D.C. you don't know —
Peter Earnest is founding executive director of the International Spy Museum and a 35-year veteran of the CIA. He is pictured outside Chadwicks in Georgetown -- where CIA agent Aldrich Ames gave classified information to a Soviet diplomat.
Mike M. Ahlers/CNN
Locals reveal the D.C. you don't know —
Chandra Manning teaches 19th-century U.S. history at Georgetown University and wrote "What This Cruel War Was Over: Soldiers, Slavery, and the Civil War." Manning is standing in front of 1315 Duke Street in Alexandria, Virginia, a building once known as the "Alexandria Slave Pen."
Mike M. Ahlers/CNN
Locals reveal the D.C. you don't know —
Richard Schaffer, a D.C. firefighter, is an authority on the Terra Cotta train wreck, which happened at this site in 1906.
Mike M. Ahlers/CNN
Locals reveal the D.C. you don't know —
Ronald and Abby Johnson, professors of history and literature, respectively, at Georgetown University, recently published "In the Shadow of the United States Capitol: Congressional Cemetery and the Memory of the Nation." They are standing in the "Public Vault" at the cemetery.
