Throughout modern history, weapons of mass destruction (WMDs) have been a shadow that has loomed large over civilization. Between nuclear, chemical, and biological armaments, countries have long sought to use these terrible inventions in the pursuit of power, as a deterrence, or even simply for survival. Some nations have successfully deployed their own WMDs during times of warfare, while others have been known to never release them at all.
Which countries have developed weapons of mass destruction in the past? Which ones own them at this very moment? And which nations have attempted to pursue them but were unsuccessful? Click through this gallery to find out.