 Welcome back to CBS News. Here's a quick look at some of the big stories that we're following for you this morning. We lost some truly beloved celebrities over the weekend. On Saturday, fitness guru Richard Simmons died at the age of 76. Actor Shannon Doherty of Beverly Hills 90210 fame lost her battle with cancer also on Saturday. She was just 53. And former NFL player and Super Bowl champion Jacoby Jones died. He was only 40 years old. His cause of death is not yet known.