On the information dissemination issue: Often (and especially with covert, security-sensitive information), revealing that you know something can be very dangerous, not least to the people who obtained that information. It's a hard call to make, but you can sometimes gain more by not acting upon something than you can by rushing in. It was for precisely this reason that Churchill did not attempt to defend Coventry in WW2. The British knew that the Germans were going to attack Coventry because they'd stolen and cracked the Enigma machine. However, to have revealed that they knew this would have caused the Germans to change their encryption methods, thus losing access to that information.
It's all about making sacrifices for the greater good.
Back to Iraq in particular:
Colin Powell has revealed some spy photos which seem to be quite incriminating. I think that we probably should go to war, but if we do, then we need to do it properly and finally, and force a change of government in Iraq. It will be no use repeating 1991, because we'll be in the same situation ten years from now. I don't have any faith at all in George Bush, and never have done. I think his handling of the Iraq situation has been poor, and principally a smokescreen for his complete failure to address domestic issues in the US. I do, however, think that he has some good people, and I hope fervently that he has the sense to listen to them.