I dunno about satelites in space, but I DO know that there's a laser weapon that shoots down missiles of all types already out. Coincidentally, just released, it's already called "the fastest weapon in the world" since its a laser rather than a round. It works by heating up the warhead of the missile till it detonates.

can't exactly shoot nukes out of the air though lol. the radioactive material it releases would still wreak havoc which is half the reason nukes are used instead of H-bombs. Besides, nukes are detonated in the air anyway, they never hit the ground.

ICBM's would deal with nukes that are still in space before they come back down but that's assuming the nuke is launched as a missile, not from a sub or bomber.

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