How likely it is for a nuclear war to occur? (Jorge Cham, 2017)

The author of PhD Comics has visited the Oak Ridge National Lab last year and has drawn a nice comic about what he learned there. It deals with the Nuclear Proliferation Treaty and how it is enforced to ensure correct/civil uses of fissile material around the globe. Nice read.

source: http://phdcomics.com/comics/archive.php?comicid=1988