Clearly we need one because North Korea or terrorists or sharks or whatever.
It's so expensive to put all that metal into space, they'll get interested in asteroid mining before long. And once there's a market for orbital-velocity asteroid metal... profit!
https://en.wikipedia.org/wiki/Kinetic_bombardment
Clearly we need one because North Korea or terrorists or sharks or whatever.
It's so expensive to put all that metal into space, they'll get interested in asteroid mining before long. And once there's a market for orbital-velocity asteroid metal... profit!