2021/02/03 09:31 FILE - Ken Burns, director of the PBS documentary series Country Music, takes part in a panel discussion during the Television Critics Association S. FILE - Ken Burns, director of the PBS documentary series Country Music, takes part in a panel discussion during the Television Critics Association Summer Press Tour on July 29, 2019, in Beverly Hills, Calif. Speaking Monday, Feb. 1, 2021, to the Television Critics Association in a virtual Q&A, PBS chief executive Paula Kerger rejected a filmmaker’s claim that public TV’s long relationship with Burns has come at the expense of diversity. (Photo by Chris Pizzello/Invision/AP, File)