Toward the end of the investigation, it has become clear that Mr. Fitzgerald has focused more on possible charges of obstruction of justice, perjury, and making false statements, rather than on laws prohibiting public revelation of a CIA official's undercover status. Mr. Rove testified four times and Mr. Libby twice.
Q. How wide was the investigation?
As special counsel, Fitzgerald was tasked with investigating the alleged unauthorized disclosure of a CIA employee's identity. The Department of Justice later clarified that he had authority to investigate any crimes committed in the course of the inquiry, such as perjury, obstruction of justice, destruction of evidence, and intimidation of witnesses.
In all, some three dozen people either appeared before the grand jury or were interviewed by the FBI or Fitzgerald. The special counsel interviewed both Bush and Vice President Dick Cheney last year, but not under oath.
Key individuals who testified late in the process include two aides to Mr. Cheney: John Hannah, an expert on weapons of mass destruction, and David Wurmser, a Middle East adviser.
Among the press, Matt Cooper of Time magazine, Judith Miller of The New York Times, Glenn Kessler of The Washington Post, and Tim Russert of NBC News all testified. Novak is widely assumed to have cooperated with prosecutors, though he has not commented publicly on the case.
Q. What was Cheney's role?
Libby learned about Wilson's wife from his boss, the vice president, before her identity had been made public, according to notes Libby took during the conversation and which were described to The New York Times by lawyers involved in the case.
It is not illegal for Libby and Cheney to discuss classified information; they both have security clearance. But the Libby-Cheney conversation contradicts reports of Libby's testimony, in which he is said to have stated that he first learned of Wilson's wife, and her employment, from reporters.
February The CIA sends Joseph Wilson to Niger to investigate whether Iraq tried to purchase yellowcake uranium. He concludes it did not.