The controversial thought that cannabis could help solve or ease the opioid epidemic; Dr. Sanjay Gupta meets patients, pioneers, and critics in an in-depth look at marijuana's potential as both an alternative to opioids in treating pain and in ending opioid addiction.

CNN's tribute honoring the life of Anthony Bourdain.

Fareed Zakaria addresses what he sees as the real reasons for North Korean leader Kim Jong Un's sudden transformation; stories of Kim Jong Un's father and grandfather; how the fearsome North Korean propaganda machine developed.