Letterman's O'Reilly Smackdown:

From CBS:

Bill O'Reilly clashed with David Letterman during his appearance on The Late Show Friday night. Letterman took O'Reilly to task for his over-simplified views and "bonehead" remarks.

At one point, O'Reilly tried to spin Letterman's frustration with the complexities of the Iraq war, saying "It isn't so black and white, Dave. It isn't, 'We're a bad country, Bush is an evil liar.'"

Letterman interrupted to correct O'Reilly, "I didn't say we were a bad country, I didn't say he was an evil liar. You're putting words in my mouth, just the way you put artificial facts in your head."