Kay fears US is losing credibility:

Former Iraq WMD inspector David Kay:

'The cost of our mistakes ... with regard to the explanation of why we went to war in Iraq are far greater than Iraq itself. We are in grave danger of having destroyed our credibility internationally and domestically with regard to warning about future events.

'The answer is to admit you were wrong and what I find most disturbing around Washington ... is the belief ... you can never admit you're wrong.'"