Responding to ever more urgent demands, he took vigorous action in the cause of equal rights, calling for new civil rights legislation. His vision of America extended to the quality of the national culture and the central role of the arts in a vital society. Instead, the Russians now sought to install nuclear missiles in Cuba. When this was discovered by air reconnaissance in October 1962, Kennedy imposed a quarantine on all offensive weapons bound for Cuba. While the world trembled on the brink of nuclear war, the Russians backed down and agreed to take the missiles away. The American response to the Cuban crisis evidently persuaded Moscow of the futility of nuclear blackmail.