Mary McCarthy denies being a source of leaked information for Dana Priest's story on "black sites" that the U.S. used to imprison captured terrorists.

But a lot of other folks may have reason to worry. From Priest's original story - which won her a Pulitzer - here are her source attributions:

"...according to U.S. and foreign officials familiar with the arrangement."

"...according to current and former intelligence officials and diplomats from three continents."

"...said one former senior intelligence officer who is familiar with the program but not the location of the prisons."

"...according to current and former U.S. intelligence officials and foreign sources. This figure, a rough estimate based on information from sources who said their knowledge of the numbers was incomplete, does not include prisoners picked up in Iraq."

"...said current and former and U.S. and foreign government and intelligence officials."

"...according to former government officials."

"...said a former senior intelligence officer who worked in the CIA's Counterterrorist Center, or CTC, during that period."

"...another former senior CIA official said."

"...according to several former and current U.S. government and intelligence officials."

"...said a senior CIA officer."

"...one intelligence official said."

"...Several former and current intelligence officials, as well as several other U.S. government officials with knowledge of the program, express frustration..."

"...said the intelligence official."

So it's clear that Priest's wasn't a one-source story.

The one person who could clear up whether McCarthy was a source is Priest herself. But she's declined comment so far.