SPY Historian Vince Houghton sat down with Sheryl Shenberger, the Director of the National Declassification Center at the National Archives. President Obama pledged to preside over the most transparent government ever — a vow that included declassifying as many documents as possible. Houghton and Shenberger discuss the process behind declassification, as the NDC tries to honor the President’s promise by closely working with intelligence agencies to release documents to the public. Why do some historic records get released while others do not? Is automatic declassification after 25 or 50 years really automatic? When do we get to learn who really killed JFK?