After the United States and Soviet Union survived the Cuban Missile Crisis and its immediate aftermath, the next steps for the two superpowers would be critical. This episode looks at Kennedy's "strategy of peace" speech at American University and the limited test ban treaty negotiated between Khrushchev and Kennedy, that some say saved the world a second time. It looks ahead at the positive and negative steps made towards Kennedy's vision of a world with fewer nuclear weapons and what challenges today's leaders face involving the spread of nuclear weapons.