Why Dick changed his mind

In a widely viewed You Tube clip, taken from a C-Span interview conducted in 1994, Dick Cheney argues persuasively that the United States was right not to topple Saddam Hussein during the first Gulf War.

He cites the potential disintegration of the country and the risk of American casualties as good reasons for the decision not to take Baghdad.

So what was it that changed his mind by the turn of the century?