欢迎光临(天龙影院-http://www.65mao.com/),本站影片皆为高清片源,如果您喜欢本站,请记得介绍你的朋友一起来看哟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