Sources & Methods: Trump's counterterrorism plan

From NPR's Sources & Methods: The attack at a mosque in San Diego underscores larger problems: the rise of far right extremism and the rise of Islamophobia. But a new White House document on rising threats make no mention of right-wing extremist groups. Host Mary Louise Kelly speaks with NPR national security correspondent Greg Myre and NPR domestic extremism correspondent Odette Yousef about what radicalized the two teens involved in the San Diego attack. They also look into the latest version of the United States Counterterrorism Strategy, which does not list far-right extremism as a threat to Americans. Plus, an update on Iran and Cuba.