On July 6, 2003, four months after the United States invaded Iraq, former ambassador Joseph Wilson's now historic op-ed, "What I Didn't Find in Africa," appeared in The New York Times. A week later, conservative pundit Robert Novak revealed in his newspaper column that Ambassador Wilson's wife, Valerie Plame Wilson, was a CIA operative. The public disclosure of that secret information spurred a federal investigation and led to the trial and conviction...