Tempest

The lie.... Saddam used chemical weapons on his own people...
The "proof" is the gassing of Kuridsh citizens in Halabja...

The facts... it was near the end of the Iran/Iraq war and Iran had seized the town... if in fact Iraq was using gas at that point, it was an attack against the Iranian forces, not the civilians as both sides were gassing each other...

Here's the best part.... "United States Defense Intelligence Agency investigated and produced a classified report, which it circulated within the intelligence community on a need-to-know basis. That study asserted that it was Iranian gas that killed the Kurds, not Iraqi gas.

The agency did find that each side used gas against the other in the battle around Halabja. The condition of the dead Kurds' bodies, however, indicated they had been killed with a blood agent -- that is, a cyanide-based gas -- which Iran was known to use. The Iraqis, who are thought to have used mustard gas in the battle, are not known to have possessed blood agents at the time."

That was from a ex CIA analyist who's job gave him access to the mentioned report..

The CIA suported that analysis during the early 1990s at least...

At the very least, one could say it's not clear what happened.. Bush would have known that.