Trump & Putin’s 'crazy' showdown: James Cameron on autocrats, nukes, Avatar & NEW films

James Cameron, Oscar-winning filmmaker and director of the ‘Avatar’ franchise, joins MSNBC’s Ari Melber to discuss his next venture: a film sharing the true stories of Hiroshima bombing survivors. Cameron shares the lessons we can learn from history in the face of turbulent global developments; how culture can inform government policy; and how Donald Trump’s leadership at times hinders peace in this new installment of "The Summit Series with Ari Melber," featuring discussions with leaders at the Summit of t ...