Is it normal that I'm very much afraid of any country getting attacked by nuclear weapons? I think of the devastation they cause and all of the innocent people who would get hurt and its depressing. Sometimes I think about it so much I have nightmares and get depressed because there is such a weapon that can cause so much harm. But I support the USA using them if we have to because I love this country and I think the USA is the greatest place in the world.

You see the problem, I hope.
I've been trying to get my point across in fewer words recently. Sometimes it works. :)
But then I wake up and realise I can stop it all from happening by killing the architect of the future apocalypse.
It's all good, right?
http://en.wikipedia.org/wiki/Tsar_Bomba
http://www.youtube.com/watch?v=LxD44HO8dNQ&feature=related
Tsar Bomba was russian and the best there has ever been. I doubt the states or anyone else will be able to hold a candle to it for long time. Also, the cold war is over. There's no more "duck and cover" or mass bomb shelters being created anymore.
But i do agree with you about the fear of war part , I get like that too , War really bothers me.