as I understand it, "fair amount of delta-v" is quite the understatement. the delta-v needed to realize that gravitational potential energy is equivalent to the

as I understand it, "fair amount of delta-v" is quite the understatement. the delta-v needed to realize that gravitational potential energy is equivalent to the moon's orbital velocity. aside from atmospheric drag in the launch phase, you're not saving much energy compared to strapping a bunch of rockets on an earth rock and letting it fall back down. much cheaper and more effective to deliver a nuke via ballistic missile.