Much discussion in this SSC thread (http://slatestarcodex.com/2015/10/31/ot32-when-hell-is-full-the-thread-will-walk-the-earth/#comment-255433) of what "nuclear war" would really mean. Mostly focused on a total US/USSR type situation, but still made a big change in how I thought about the subject in general.
India vs. Pakistan: the nuclear option is dangerously close, and nobody seems to want to prevent it
http://qz.com/541502/a-nuclear-war-between-india-and-pakistan-is-a-very-real-possibility/