theorists later called the memo, one of thousands of files released by the National Archives in 1994, the first sign of a cover-up by the government. Later years Katzenbach left government service to work for IBM in 1969, where he served as general counsel during the lengthy antitrust case filed by the Department of Justice seeking the break-up of IBM. He and Cravath, Swaine & Moore attorney Thomas Barr led the case for the computer giant for 13 years until the government finally decided to drop it in 1982. Later Katzenbach led the opposition against the case filed by the European Economic Community. He retired from IBM in 1986 and became a partner at the firm of Riker, Danzig, Scherer, Hyland & Perretti in New Jersey. He was named chairman of the failing Bank of Credit and Commerce International (BCCI) in 1991. In 1980, Katzenbach testified in the United States District Court for the District of Columbia for the defense of W. Mark Felt, later revealed to be the "Deep Throat" of the Watergate scandal and later Deputy Director of the FBI; accused and later found guilty of ordering illegal wiretaps on American citizens. In December 1996, Katzenbach was one of New Jersey's fifteen members of the Electoral College, who cast their votes for the Clinton/Gore ticket. Katzenbach also testified on behalf of President Clinton on December 8, 1998, before the House Judiciary Committee hearing, considering whether to impeach President Clinton. On March 16, 2004, MCI Communications in a press release announced "its Board of Directors has elected former U.S. Attorney General Nicholas Katzenbach as non-executive Chairman of the Board, effective upon MCI's emergence from Chapter 11 protection. Katzenbach has been an MCI Board member since July 2002." MCI later merged with Verizon. Katzenbach was a member of both the American Academy of Arts and Sciences and the American Philosophical Society. Katzenbach and his wife Lydia retired to Princeton, New Jersey, with a summer home on Martha's Vineyard in West Tisbury, Massachusetts. His son is writer John Katzenbach. His daughter, Maria, is also a published novelist. After the death of W. Willard Wirtz in April 2010, Katzenbach became the longest surviving former U.S. Cabinet member. Katzenbach died on May 8, 2012, at the age of 90. See also Some of It Was Fun: Working with RFK and LBJ (W. W. Norton) – publisher web site Video: Nicholas Katzenbach talks about