This week "Sunday Morning," hosted by Jane Pauley, features stories on the Mueller Report, which was turned in to the attorney general by Special Counsel Robert Mueller on Friday. Plus: Brook Silva-Braga looks into the origin of the NCAA March Madness brackets phenomenon; Tracy Smith meets Grammy-winning singer Brandi Carlile; Luke Burbank talks with comedian Kathy Griffin about the death threats she faced following her photo involving the severed head of President Trump; and from Josh Seftel, producer of "The Secret Life of Muslims," comes the remarkable story of the education of an Islamophobic former U.S. Marine.