Bill Clinton was heckled earlier this week in Minnesota by 9/11 conspiracy theorists, and promptly took them down:

Early in his speech, Clinton was sporadically heckled. One heckler shouted that 9/11 was a fraud, and Clinton bristled. "No, it wasn't a fraud. I'll be glad to talk about it if you'll shut up and let me talk." The heckling continued, and he told another heckler "these people did not come here to hear you speak. If you don't have any self-control, we can deal with that."

When a third called 9/11 an "inside job," Clinton snapped back "How dare you? I live in New York, and I know who did that. You guys have got to be careful, or you're going to give Minnesota a bad reputation."