Already discussed elsewhere info
This very topic was discussed more or less elsewhere within the forums.
Subj: If the WW3 happens.
I placed a posting titled: Are you kidding? on December 8, 2005 @ 02:54 AM.
Short version of the post: Man would in all likelyhood become extinct after a prolonged period of great upheaval and the lowly Cockroach would inherit the Earth because they thrive on radiation that would kill man.
(For more info goto the other forum.)