核弹（1080）

　　See how America developed the most destructive invention in human history - the nuclear bomb - how[展开全部]

　　　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[收起部分]