Gore on Global Warming: Calling names, not arguing facts

I have previously discussed the 400 scientists who question the notion that there is significant man-made global warming. CBS has this from Al Gore:

(CBS) Self-avowed "P.R. agent for the planet" Al Gore says those who still doubt that global warming is caused by man - among them, Vice President Dick Cheney - are acting like the fringe groups who think the 1969 moon landing never really happened, or who once believed the world is flat. . . . .