On the morning of June 12, 1982, as the sun shined down on the green grass in Central Park, people began to gather carrying signs for nuclear disarmament. Throughout the morning, buses arrived from around the country. By the afternoon, nearly every blade of grass was covered. Citizens filled second, third, fifth, sixth, seventh, and Madison avenues. By mid-afternoon, the police estimated that over 750,000 people were in Central Park demanding an end to nuclear weapons. By the end of the day, that number had swelled to 1 million. The rally and subsequent march were organized around the United...