Trump open to 'big shift' on North Korea denuclearization

Last June's summit between President Trump and Kim Jong Un marked the first time a sitting U.S. president met a North Korean leader. Now the two are convening in Vietnam, whose economic resurgence U.S. officials hope can serve as an incentive for North Korea to prioritize cooperation with the U.S. Judy Woodruff talks to Nick Schifrin, who is reporting from Hanoi, about the summit's policy goals.