Powell's "painful blot"

In a Barbara Walter's interview, written up on the Telegraph (The Daily Telegraph's online newspaper):

Asked whether the statement about WMD tarnished his reputation, [Powell] responded: "Of course it will. It's a blot. I'm the one who presented it on behalf of the United States to the world and [it] will always be a part of my record. It was painful. It's painful now."

"[CIA Chief Tenet] didn't sit there for five days with me misleading me. He believed what he was giving me was accurate…the intelligence system did not work well," Mr Powell said.