1945年8月9日，对于日本的长崎来说，这是一个和广岛8月6日一样黑暗的日子。但是对于美苏长达近半个世纪的核对抗来说，8月9日这一天充满了难解之谜。是一颗？还是两颗？有一些核武器专家认为，美苏核对抗的真正开始，也许应该从这一天算起。半个世纪以来，美苏两个核大国，都 August 9, 1945, Japan Nagasaki, this is a dark day as Hiroshima on August 6. But for the nuclear confrontation that has lasted nearly half a century between the United States and the Soviet Union, August 9 is full of mysteries. Is it a? Or two? Some nuclear experts believe that the real start of the nuclear confrontation between the United States and the Soviet Union should perhaps start from that day. For half a century, the two nuclear powers of the United States and the Soviet Union, both