The standards of the international community manifest firmness. Iran has no need for long-range missiles or to collaborate with terrorist organizations all over the world.
Pigs prefer to wallow in clean mud, but if nothing else is available, they will frequently wallow in their own urine, giving rise to the notion that they are dirty animals.
You have to have as many defences in place as you possibly can. But even then of course - and it's important to stress this - you cannot guarantee being able to prevent every attack or every kind of attack.