India and Pakistan are do not like one another. Both have nuclear warheads pointed at each other. The USA and Russia still do not see eye to eye. Both have nuclear war heads pointed at one another....as well as towards China. China is China and wants to be friends with everyone but has nuclear warheads pointed at most western capitals. Bottom line...noone is going to push the button. The 1st nuclear warhead fired at any other country will immediately result in retalliation. This will bring in alliances and then missiles will be flying all over the place. End result is THE END. Like at the last scene of a movie. Having nuclear weaponry results in fear to using it. The great deterrent is ownership.
47 killed in clashes between ISIS, Syrian rebels near Turkey border, monitor says (Reuters)
from the article: Obama to Iran: Offer of dialogue still stands