Thousands of fans braved the rain at Nissan Stadium during Night 1 of CMA Fest on June 6 to see scheduled performances by Kane Brown, Kelsea Ballerini, Brothers Osborne, Rascal Flatts and Florida Georgia Line, with surprise appearances by Tanya Tucker, Brandi Carlile, Midland, Ashley McBryde, Brooks & Dunn, Morgan Wallen, the Chainsmokers and Hardy.…