Former Secretary of Defense William J. Perry & Tom Z. Collina of the Ploughshares Fund talk to Jim about their book, The Button: The New Nuclear Arms Race and Presidential Power from Truman to Trump. They cover today's nuclear weapons amnesia, the current nuclear situation, the growing number of nuclear-armed countries, US presidential nuclear powers, first-use policies, the danger of 'launch on warning', three ways of blundering into nuclear war, nuclear game theory, the New START Treaty, William & Tom's proposed nuclear operations improvements, the plausibility of abolishing nuclear weapons, and more.