Forty is not what it used to be, at least not if you're a professional athlete. 44-year-old Serena Williams returned to Wimbledon, albeit losing to a 20-year-old. 41-year-old LeBron James just announced he'll be playing another year, though leaving the Lakers. Mark Strassmann has the story.

Original source: https://www.cbsnews.com/video/age-defying-pro-athletes-amaze-fans-inspire-generations/