You do realize this is the only level of analysis you and a few others apply to these things? Defectors, documents, analyses, records, anything at all. Its credibility to you is directly proportional to how bad it is for Bush. Had this letter said something along the lines of "we had no al Qaeda in Iraq before this war," it would be written in gold as far as you are concerned.

If you attempted anything other than linear thinking, you would realize that if the military or anyone else was into using deliberately forged documents, they would have "found" stockpiles of WMD months ago.

If anyone is actually interested in facts, the letter is discussed in this DOD transcript, and it looks like the original text will be available online tomorrow.