The United States, Canada and Britain all are now saying a missile was the reason for the deadly crash of a Ukrainian passenger plane this week. Iran still denies this and is pointed toward an unknown mechanical issue with the aircraft. We hear more about the evidence in cellphone videos taken as the plane came down. And, how do airlines choose to fly or not when a hostile situation is developing in a given area. Also, author and photographer Teju Cole has shared a playlist he made after spending time in Mali's capital enjoying live sets by top-notch guitarists.