Medvedev: If Russia loses conventional war in Ukraine it could trigger nuclear conflict
Russian President Vladimir Putin has also stated that the risk of nuclear war is increasing
If a nuclear weapon is about to explode, here are 17 things you can do
Nuclear weapons are deadly, but -surprisingly- their worst effects are confined to a limited zone
NATO to go ahead with planned nuclear exercises
"It would send a very wrong signal if we suddenly now cancelled a routine, long-time planned exercise", NATO Secretary-General Jens Stoltenberg said