DATE: August 11,1951 FROM: GENERAL OWEN SOMMERS, US ARMY SPECIAL PROJECTS COMMAND TO: ALL MILITARY FORCES GENERAL ORDER: 417 The following orders apply to all executive level escape routes regardless of whether they utilize specially constructed tunnels, subways, city sewers of other passageways. The location and management of all such routes is classified secret--and shall remain so until further notice. Any unauthorized personnel be they military or civilian found in around such routes will be shot on sight. Specifically sentries will: 3. To quit their post only when properly relieved.