excellent nuke website
www.nti.org is a very serious, up to date website. Check it out.
by the way, an even more jarring, amazing film about nuclear weapons (MUCH more powerful) is "Threads," a 1980s BBC made for television film by Barry Hines. It came out in about 1984 or so.... HEre it is, I found it:
www.imdb.com/title/tt0090163/
very, very powerful and frightening. It will freak out kids, (as it really ought to, frankly), so, just be careful.