Plame was covert:

Special prosecutor Patrick Fitzgerald “found that Plame had indeed done ‘covert work overseas’ on counterproliferation matters in the past five years, and the CIA ‘was making specific efforts to conceal’ her identity, according to newly released portions of a judge’s opinion.” Scooter Libby’s lawyers and White House allies “have repeatedly questioned whether Plame…really had covert status when she was outed to the media in July 2003.”