** FILE **Associate Justice of the U.S. Supreme Court Clarence Thomas speaks at Marshall University in Huntington, W.Va., in this Sept. 10, 2007, file photo. Breaking his 16-year public silence on his bitter confirmation hearings, Thomas says Anita Hill was a mediocre employee, who was used by political opponents to make claims she had been sexually harassed. Thomas writes about Hill, his former employee in two government agencies, in his autobiography, "My Grandfather's Son", which goes on sale Monday, Oct. 1, 2007. (AP Photo/Randy Snyder, File)