Seymour Hersh, one of journalism's crankier bulldogs, was in an upbeat mood. At least for him. A confidential, well-placed source had told him that U.S. special prosecutor Patrick Fitzgerald's 22-month inquiry into the outing of former CIA agent Valerie Plame, wife of ex-diplomat Joseph Wilson IV, would go further than anyone had heretofore thought. "He's going to save America," Hersh predicted, on the phone from his home in Washington, just days before Fitzgerald announced indictments against I. Lewis (Scooter) Libby, U.S. Vice-President Dick Cheney's chief of staff, on Friday.