Found this article over at Fox News this morning... like we needed further proof that a nuke fest would be bad. 

Cold War nuclear weapons warped Earth's magnetosphere - revealing what the true fallout could be if World War 3 broke out.

http://www.foxnews.com/tech/2017/05/22/cold-war-nuclear-weapons-warped-earths-magnetosphere-revealing-what-true-fallout-could-be-if-world-war-3-broke-out.html