[wrench]

No that old, came after we went to the moon. They are upgradeable via reusing existing components and adding newer tech. "The B61-3 has a dial-a-yield ranging from .3 to 170 kt, while the B61-4′s yield ranges from .3 – 50 kt. These weapons, because they are deployed in Europe and carried by fighter bombers, are dubbed to be strategic. (The range of the delivery vehicle matters for classification purposes) The new weapon, dubbed the B61-12, will cannibalize parts from all of the B61 mods and consolidate them into a new bomb." It appears they are far from useless, old relics.

[RoosterRedux]

Comment noted.

I will get on top of this tomorrow and see what I can find.