"Human Flow": World-Renowned Artist & Activist Ai Weiwei on His Epic New Documentary on Refugees

The United Nations says there are now more refugees worldwide than at any time since World War II. The journey and struggle of these 65 million refugees is the subject of Chinese artist and dissident Ai Weiwei's epic new documentary. It's called "Human Flow." For the documentary, Ai Weiwei traveled to 23 countries and dozens of refugee camps. We speak to world-renowned Chinese artist and activist Ai Weiwei.