In January 2004, a delegation from Stanford University led by Prof. John W. Lewis and joined by one of the authors, Siegfried S. Hecker, at the time senior fellow at the Los Alamos National Laboratory and former director, was invited to visit the Yongbyon Nuclear Center. This visit by Hecker and follow-on visits during each of the next six consecutive years contributed substantially to our knowledge of North Korean nuclear activities. In this report, we utilize information obtained during the Stanford delegation visits, along with other open-source information, to provide a holistic assessment of North Korean nuclear developments from the demise of the Agreed Framework through November 2015. To read the full article, click here.