**FILE**The head of the American Civil Liberties Union Nadine Strossen , holds a book titled "Defending Pornography," at a press conference in Philadelphia on in this Thursday, Oct. 22, 1998 file photo. American Civil Liberties Union President Nadine Strossen announced Friday, May 16, 2008, that she will step down in October after leading the group for nearly two decades. (AP Photo/H. Rumph, Jr, file)