It was done by famous investigative reporter, Soladad O'Brien. Unfortunately, CNN hasn't posted the chat, so I'm cribbing from Nexis. The two things that stuck out to me:
1) Shaffer names names. He says he told, among others, former 9/11 executive director Phil Zelikow Able Danger (and Atta?) back in 2003 and was blown off. The 9/11 panel has previously said Zelikow was in on the 2003 interview, but Shaffer really homes in on him:
S. O'BRIEN: I mean, why isn't this six months ago, even earlier than that? Why now?
SHAFFER: Well, I understand. I can't address the report, other than I know I provided information to Mr. Zelicow (ph) in Bagram of October of '03. That information was significant in the fact that in their 12 August statement, they talk about that he called back immediately, requesting more information. I was asked to talk to him in January of '03, where I called his office -- I mean January '04, where I called his office, and they changed their mind about talking to me.
[Later in the interview:]
The other thing is Mr. Zelicow (ph) himself gave me his card and asked me to contact him upon my return from the deployment. And I did contact him in January of '04. That's where I was essentially blown off.
I called him. They said they wanted to talk to me. I waited a week, called him back. And they said, "No, we don't need to talk to you now."
2) As Laura Rozen has noted, in the interviews Shaffer has had so far, there is "a kind of vagueness about what exactly [Able Danger] found." Now, that could be because of classification issues. It could be because of...who knows what. But one possibility is that Shaffer actually has limited knowledge about the program. Over to no-B.S. O'Brien:
S. O'BRIEN: Mohamed Atta, who was obviously part of this team of hijackers. Where did this information that he was a terrorist linked to al Qaeda, where did this come from that you had that nobody else in the security branch, as far as we can tell, had that information?
SHAFFER: I didn't have the information. I was part of the task force which supported Able Danger.
I know: None of this means Shaffer was wrong. But I still leaves me with the feeling that the story is, at the least, murkier than Shaffer's take. Let's see what the Pentagon has to say...
P.S. Full interview below the fold. (Sshhhh... don't tell CNN.) It includes more detail about exactly what his role was. At one point Shafffer calls himself a "manager." As Laura says it's all very vague.