Bibi rocks, but unfortunately Israel will have to go it alone against Iran if it wants to survive. Nuclear weapons are a game changer. Iran lobs one at Israel, via missile or more likely via a terrorist, and there really isn't the time to take weeks or months and definitively determine the source of the fissile material. By the time you do that your country is destroyed.

This compressed time frame between attack and counter-attack is problematic. Failure to respond in kind within minutes risks complete destruction. The chance for a nuclear volleyball game in the mideast is real and growing more likely as Iran approaches nuclear weapons capability.

At any rate, North Korea is producing nuclear weapons as fast as it can and it will only be a matter of time before they sell some to terrorists to attack the Great Satan (USA). Will the US respond before the country of origin of the material is determined? The risks of failing to respond are devastating. These nuclear war "what ifs" are being constantly war-gamed. The unfortunate part is that your enemy in some scenarios DOES NOT concern itself with MUTUAL ASSURED DESTRUCTION! What then?