The ruthless rise of North Korea's Kim Jong Un

Life in North Korea is difficult for outsiders to imagine. A new book attempts to pull back the curtain of opacity as it examines the country’s leader, Kim Jong Un, who took over from his dictator father when his older brother fell out of favor. Nick Schifrin talks to The Washington Post's Anna Fifield, author of “The Great Successor: The Divinely Perfect Destiny of Brilliant Comrade Kim Jong Un.”