If it really came down to it, and you did have to defend yourself against an interstellar attacker, would a traditional gun actually be able to do the trick? Let's gaze at the idea, and crunch some numbers to find out.
The idea that just about anyone with access to a 3D printer could spit out a gun with a few clicks was disconcerting, but the person firing the thing was putting themselves in just as much danger as the person on the other end. Until now.
Photographer Herlinde Koelbl spent six years snapping military training grounds for a new book called Targets, offering a rare, behind-the-scenes look at the wide interpretation of international bad guys.