OK NOW, THIS IS THE ANSWER Y WE DONT DISARM OR ANY OTHER COUNTRIES: first of all, u need to think this in bigger, grander way. even if US disarms and force other contries, they will not because first u need to kno y n how nukes are present. nuclear bomb, was first built by US by the suggestion of Albert Einstein that the Germans r building them too. they didnt wanted to fall behind in technology. if the germans had this "NUKE" america need a counter attack. so for the sake of US defense, they started the Manhattan Project. ALL the scients, physists, weapon experts from all over the world came togetther and devloped the bomb. like how it was started, nukes were built for SELF DEFENSE. now, US had rose to world power and have nukes for defense and oppresion to other countries in counter measures. Now, all these communist, economicaly challenged countries, and other small countries build nukes for the same purpose as US did; to defend themselves against world's superpower as Russia and US. IT IS IMPOSSIBLE FOR ALL THE COUNTRIES TO DISARM SINCE THEY FEEL UNSAFE FROM OTHER COUNTRIES. all comments, corrections, and negative counters are welcomed :)