[Nateman]

And only about 4 decades after we did it, why are they bothering?

Imagine talking a bolder on the moon and then putting a ring of steel around it. You then accelerate said bolder through a series of magnets to get it to escape velocity. When it hits the Earth it has the force of an atomic bomb. Not a bad place to be where mere rocks can be made into atomic bombs. In short the moon is the ultimate strategic position. That's why.

[GOP_1900AD]

I hadn't thought of that one... that would be pretty bad....