Both the United States and UK issued dossiers last autumn making a series of accusations against Iraq.
Not only have no mass weapons systems been found (one has to add a "yet" here), but there were major flaws in the documents which will put in doubt any assessment of programmes elsewhere - in North Korea, Iran and Syria, for example.
Although many intelligence professionals prefer to keep any review of what went wrong (and right) private and in-house, some professionals are speaking out.
One of the fiercest critics is Alex Standish, editor of Jane's Intelligence Digest.
He said: "The bottom line is that the intelligence services have not covered themselves with glory."
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