核弹

　　See how America developed the most destructive invention in human history - the nuclear bomb - how it changed the world and how it continues to loom large in our lives. Hear from historians and those who experienced the dawn of the atomic age. 　　- Written by PBS 译文(3): 看看美国是如何发展出人类历史上最具破坏性的发明——核弹——它是如何改变世界的，它是如何继续在我们的生活中占据重要地位的。听听历史学家和那些经历过原子时代黎明的人的意见。