Steve Procko discusses his book "Captured Freedom: The Epic True Civil War Story of Union POW Officers Escaping from a Southern Prison." The book tells the story of an intriguing photograph that for many years was misidentified as a group of confederate soldiers. In fact, the photo captures the images of a number of Union soldiers who managed to escape a Confederate prison. Pictured with them are three of the guides who aided them. Procko's book chronicles their story.