[Shannon93] John H. Shannon and David A. Rosenthal Electronic Mail and Privacy: Can the conflicts be resolved?, Business Forum 18, no. 1,2 (Winter/Spring 1993):31--34. [Oliver North, the now famous Marine officer at the heart of the Iran-Contra scandal, used an electronic mail system to communicate with staff at the White House. When it was apparent that he would be charged with illegal activity, he shredded paper documents and purged e-mail messages that might be incriminating. Unbeknownst to him, messages on the e-mail system were routinely copied by a backup procedure. It was from these backup tapes that evidence was retrieved and used against him in both the Senate hearings and criminal proceedings.]