New Evidence on the Origins of Overkill
Update - 1 October 2009 - On 11 September 2009, as a sidebar to the posting "Previously Classified Interviews with Former Soviet Officials Reveal U.S. Strategic Intelligence Failure Over Decades," the National Security Archive posted histories of SIOP-62 and 63, with more information declassified by the Interagency Security Classification Appeals Panel (ISCAP). Those updated versions replace the histories originally posted in 2007—Documents 1 and 2 below.