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Comedy Writers Alan Zweibel and Norman Lear on how Laughter Can Help Heal Hardships

Alan Zweibel, one of the original writers on Saturday Night Live, and legendary television producer Norman Lear join CBS News' Dr. Jon LaPook to discuss what they learned from setbacks in their own careers. Zweibel is out with a new memoir called "Laugh Lines: My Life Helping Funny People Be Funnier." He and Lear discuss the roll of comedy when dealing…