(CNN) - Bill Clinton engaged with a heckler head on Thursday at a Denver campaign stop.
The former president had just begun his speech when a man began to shout about 9/11 conspiracies.
As security attempted to escort him out, Clinton stopped his speech, saying, "What are you screaming about? Let him talk."
"Are you one of those it-was-an-inside-job guys? Let me tell you something…I let you be rude and interrupt me, scream at the top of your lungs. 9/11 was not an inside job; it was an Osama bin Laden job with 19 people from Saudi Arabia," Clinton continued. "They murdered 3000 Americans and others foreigners, including over 200 other Muslims. And we look like idiots, folks, denying that the people who murdered our fellow citizens did it when they are continuing to murder all around the world. So we heard from you: you go away."