Isn't it ironic that we try to achieve peace by having weapons that can obliterate the world in a matter of minutes.
Yes, incredibly ironic. The wars are are all the same - one side doesn't agree with another's view point, so they try to force them into submission with weapons. The other side (or a third side) identifies the first side's audacity to oppress a people so they bomb the shit of them to force them into submission.
The only way this shit stops is when everyone puts the guns down.
It is not possible. Who will agree to put your weapons on the ground? I don't believe it. Nuclear weapons of North Korea can only scare neighboring States, but the faster will be destroyed the regime of Kim the less will be the victims.