North Korea appeared to fire a ballistic missile on Sunday as a challenge to President Donald Trump. Japanese Prime Minister Shinzo Abe, who was with Trump at his Florida estate Mar-a-Lago when they received the news, called the move “intolerable.” For more on the implications, Jon Wolfsthal, a fellow at Harvard University and former special assistant to President Barack Obama for nonproliferation issues, joins Hari Sreenivasan from Washington, D.C.