Acclaimed classical pianist Jeremy Denk's new memoir begins with his first piano lessons and ends with his last formal lesson when he was 26. He'll talk about the obsessive practicing and repetition that's essential to reach his level of proficiency, and what he's learned about technique and conveying emotion. We'll also hear music from his new album.John Powers reviews the new CNN documentary Navalny, about the Russian dissident who survived a murder attempt and is now in prison. And jazz critic Kevin Whitehead pays tribute to bassist Charles Mingus on the 100th anniversary of his birth.