The problem DC, is that the UN's weapons inspectors weren't about to declare there WERE WMDs. In fact, about a week and a half before Colin Powell spoke to the UN, Hans Blix testified that NO WMDs had been found. Now, the US found the weapons inspectors' evidence mighty inconvenient, which is why they decided to go in pre-emptively, without final approval by the UN. UN weapons inspectors were still in Iraq 48 hours before the US started it's bombing campaign. The US and Britain, and their mockery of an international coalition, WERE in violation of the UN charter when they invaded pre-emptively without a UN resolution authorizing them to invade and act on behalf of the UN for WMD inspection violations.

The US and Britain, along with their coerced coalition of the willing DID violate the UN charter on invasion of sovereign nations. Period. End of story.