Other lies about this action in Iraq:

They said "We're not looking for regime change. We just want Saddam to dissarm." Then they said that nothing short of regime change would suffice.

They said, "This is about weapons of mass destruction." Then they said it's about liberating the Iraqi people.

They lied about having proof of a connection between Saddam Hussein and Al Qaeda, when they had no proof at all.

An unbelievable number of people here in the US firmly believe that Saddam Hussien is responsible for 9/11, because the US government has mislead them into believing that.

The lie about the documents from Niger (which turned out to have been forged) are a big part of the case the Bush administration used to convince Congress to pass legislation allowing Bush to attack Iraq. Without that lie, there are serious questions about whether or not he would have gotten that authorization from Congress.