A possible implication of the removed text, via Needlenose:
On July 12, the day Cheney and Libby flew together from Norfolk, the vice president instructed his aide to alert reporters of an attack launched that morning on Wilson's credibility by Fleischer, according to a well-placed source.
Libby talked to Miller and Cooper. That same day, another administration official who has not been identified publicly returned a call from Walter Pincus of The Post. He "veered off the precise matter we were discussing" and told him that Wilson's trip was a "boondoggle" set up by Plame, Pincus has written in Nieman Reports.
What I think the Post and Marshall are trying to imply is that those calls from Air Force One were specifically orchestrated by Libby, based on Cheney's instructions on Air Force Two. And special prosecutor Patrick Fitzgerald has sources on both planes to back that theory up.