This little tidbit was picked up at the blog-that-must-not-be-named as an example of Republican 'lies', the lie supposedly being that Valerie Plame was not a covert agent because she openly went through the gates of CIA headquarters every day.
Supposed CIA official Larry Johnson says that "there are thousands of undercover CIA employees who drive through the three gates at CIA Headquarters in McLean, Virginia everyday." Thus, supposedly establishing that Plame could have gone to work at CIA headquarters every day and still be a 'covert operative.'
Only one problem: CIA headquarters is in Langley Virginia, not McClean, and Langley is where Plame worked. McClean houses CIA operations, and is not their analysis center. You would think a CIA official opining on the all-important Plame affair would know this.