Former U.S. Secretary of State George Shultz, middle, and Gov. Jerry Brown, left, listen to speakers before the unveiling of the “Doomsday Clock” at Stanford University in January 2016.
Former U.S. Secretary of State George Shultz, middle, and Gov. Jerry Brown, left, listen to speakers before the unveiling of the “Doomsday Clock” at Stanford University in January 2016. Jeff Chiu AP
Former U.S. Secretary of State George Shultz, middle, and Gov. Jerry Brown, left, listen to speakers before the unveiling of the “Doomsday Clock” at Stanford University in January 2016. Jeff Chiu AP