David Sanger; Jack Nicklaus; Gavin Turk

David Sanger of The New York Times attempts to shed light on the actions of North Korean leader Kim Jong-un, as questions about North Korea's nuclear capabilities grow. Hall of Fame golfer Jack Nicklaus reflects on how golf has changed since he played professionally and shares his thoughts on other great golfers. Conceptual artist Gavin Turk discusses the ideas behind his work and what inspires him.