So the nuclear arms race began, and in 1960 President John F. Kennedy warned that there would be 15, 20, or 25 nuclear states by the mid-1960s. “I ask you,” he said in 1963, “to stop and think for a moment what it would mean to have nuclear weapons in so many hands, in the hands of countries large and small, stable and unstable, responsible and irresponsible, scattered throughout the world.”
于是，核军备竞赛开始了。1960年，美国总统肯尼迪警告说，到20世纪60年代中期将由15、20乃至25个有核国家。“我要你们停下来想一想，” 他在1963年说，“这么多人手里都有核武器，大大小小的国家都有核武器，不论稳定还是动荡，不论负责还是不负责，不论位于世界哪个角落，意味着什么？”