. >>> next, virginia commonwealth instructor chris officer saladino to the cold war nuclear women's. he talks about mutually destruction which kept the u.s. and soviet union from engaging in open war. this history lesson is 50 minutes. >> let's to recap a little bit. we have segued. we are talk building international community. we have talked about war. we have talked about this overdetermined war, the first world war. we talked about the second world war. how military force was organized. kind of historically. then we said, okay, the way militaries are organized look a certain way. but technology changes that. then we introduce the cold war. butted real mitigating factor for this will be nuclear weapons. today we will talk about the rise of nuclear weapons. we started talking about the rise of nuclear weapons on monday where we talk about the original nuclear arms race, the race between germany -- nazi germany in the united states to develop a weapon. and we talked about how germany was knocked out of that essentially through a bunch of circumstances surrounding their attempt to pro