This week, Jon Stewart announced his retirement from The Daily Show. He'll be missed -- not just because he was funny, but because he told the truth in an era when much of the media wouldn't. Later that same night, 60 Minutes correspondent Bob Simon was killed in a car accident. "There was nothing simple about Bob Simon," said Anderson Cooper. "Except that he was simply the best." The next day, David Carr collapsed and died in the New York Times newsroom. The grace and wisdom he earned the hard way suffused his generous spirit. He never sugar-coated his insights, especially about recovery and redemption. "We all walk this earth feeling we are frauds," he wrote. "The trick is to be grateful and hope the caper doesn't end any time soon." Sadly, with David and Bob Simon, it ended much too soon.