This State Department cable states that a letter was received from Stephen Toope, Chairman of the United Nations' Working Group on Enforced or Involuntary Disappearances. The letter concerns a report by the Working Group Enforced or Involuntary Disappearances regarding alleged secret detention centers under United States' authority in various parts of the world and invites the U.S. government to submit written response to the accusations/claims of the existence of such facilities.