The Stanford mathematician William J. Perry was a strategic nuclear advisor to U.S. President John Fitzgerald Kennedy during the Cuban Missile Crisis in 1962, and then he became U.S. Secretary of Defense under President Bill Clinton.

He stated in a speech on November 28th at the National Cathedral in Washington DC, that "inexplicably to me, we're recreating the geopolitical hostility of the Cold War, and we're rebuilding the nuclear dangers," and he went so far as to make clear why "I believe that the likelihood of some sort of a nuclear catastrophe today is actually greater than it was during the Cold War."