Heeere's Johnny Carson, an 'American Masters' film

Talk show host Johnny Carson taped his last "Tonight Show" on May 22, 1992. He hosted 4,531 episodes and received 23,000 guests. (Associated Press)

Talk show host Johnny Carson taped his last "Tonight Show" on May 22, 1992. He hosted 4,531 episodes and received 23,000 guests. (Associated Press)

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