The sitcom is, and always shall be, an ever-changing art. There exists no perfect formula for success between various three-camera and single-camera efforts over the years. While some may bemoan the heightened situations and laugh tracks of a three-camera outing like the modern 'Big Bang Theory,' others remember how 'Cheers' and 'Seinfeld' among others perfected the format. So according to a recent '60 Minutes' poll, what's the greatest sitcom of all time? Is it as funny as a bag of airline peanuts?