http://www.dailykos.com/story/2013/09/26/1241386/-World-War-III-almost-happened-on-this-day-30-years-ago
http://www.history.com/news/history-lists/5-cold-war-close-calls
http://listverse.com/2012/05/26/top-10-catalysts-for-world-war-iii/
http://nuclearfiles.org/menu/key-issues/nuclear-weapons/issues/accidents/20-mishaps-maybe-caused-nuclear-war.htm
http://www.zmescience.com/science/three-technological-incidents-that-almost-started-world-war-iii/#!NTZyk