WTOP Entertainment Reporter Jason Fraley chats with jazz and hip-hop dynamo Robert Glasper, who kicks off his Kennedy Center residency today through Sept. 19. They spoke in 2020 about his stellar career, from his Grammy-winning collaboration with Kendrick Lamar on “These Walls” to his Emmy-winning duet with Common on “Letter to the Free” from the soundtrack of Ava DuVernay’s documentary “13th.”