Lou Dobbs Tonight, (7/15/05) as Lou was introducing a piece on the Rove story.
Lou says, "...Rove testifying that he first learned about Plame from columnist Robert Novak, a CNN contributor. Danna Bash reports." Immediately after that you can clearly hear a female voice on mic whispering "that's bullshit". Then Dana Bash continues with her report.
Download -WMP only (it's low quality)
(Thanks to Wendy)
If they don't edit this out in the re-broadcast I'll have a QT version also.