**CORRECTS TO D-N.Y.** ** FILE ** Then New York City Mayor Rudolph Giuliani, center, leads Sen. Charles Schumer, D-N.Y., second from left, New York Gov. George Pataki, second from right, and Sen. Hillary Rodham Clinton, D-N.Y., far right, on a tour of the site of the World Trade Center terrorist attack in this Sept. 12, 2001 file photo. Giuliani's White House aspirations are inescapably tied to Sept. 11, 2001 - for better and for worse. (AP Photo/Robert F. Bukaty, Pool, File)