A look at world’s nuclear reality, 70 years after Hiroshima

Aired: 5/27/2016 | 0:07:15 | Clip
President Obama used his unprecedented visit to Hiroshima to call attention to the grave threat nuclear weapons still pose to the world. Judy Woodruff talks to former Assistant Secretary of State Stephen Rademaker and Rachel Bronson of the Bulletin of the Atomic Scientists about that threat — and the president’s own nuclear legacy.