CIA leak prosecutor Patrick Fitzgerald argued at a hearing Friday that, as far as the perjury charges against former Cheney chief of staff Lewis Libby are concerned, it does not matter whether or not Valerie Wilson was a covert CIA agent when she was mentioned in the famous Robert Novak column of July 14, 2003. "We're trying a perjury case," Fitzgerald told Judge Reggie Walton. Even if Plame had never worked for the CIA at all, Fitzgerald continued — even if she had been simply mistaken for a CIA agent — the charges against Libby would still stand. In addition,...