Former President Clinton's office declined to comment today on reports that he managed to lose the personal identification code needed to confirm nuclear launches and never told anyone about it. Gen. Hugh Shelton, chairman of the Joint Chiefs of Staff during the last few years of Clinton's term, writes about the episode in his new autobiography. Shelton is especially sensitive to the proper authentication procedures, having served as deputy commander of the National Military Command Center (NMCC), through which all nuclear launch progression action chains are processed. The National Command Authority (NCA), as the process and the person of the...