Why should they have to stop anything? No one wanted to stop Pakistan from getting nukes, despite them openly being an islamist nut state. Yet Iran wants nuclear power and suddenly there's an uproar. Funny how that works isn't it? The second the US allowed that bullshit to happen, it lost the right to say a damn thing about any other country. For god sakes, you let Pakistan, a known muslim extremist state get the bomb. You even let N. Korea, a fascist country hellbent on blowing up Japan, get the bomb.