France is 1, they have nuclear weapons and have signed and ratified the NPT. 2 is Pakistan, they have conducted tests and claim that they have nuclear weapons, but haven't signed the treaty. Israel is 4 because it hasn't declared itself and is ambiguous when it comes to nuclear weapons, but it is suspected that they have it. Iraq is 3, they were invaded because it was feared that Sadam's regime has nuclear weapons and is ready to use them.