From: Tucson, AZ
WTF happened to the navy?
My R&D department succeeded in building a particle beam weapon that can kill whatever it can see ( straight line-of-sight ). There's a small tank of H2, hydrogen molecules, that feeds the reactor, where the molecules are accellerated by strong magnetic fields and released to the rifle barrel all at once where there's a loud boom as the slug of particles break the sonic barrier as they leave the barrel and about half a second later the target vaporises in a cloud of smoke. The machine is really heavy so we deployed it on a ship up high in the tower so it could see further out to the horizon and theoretically there's no range limitation and the only requirement is a direct line-of-sight to the target. The most expensive parts of the machine is the superconducting magnets. They are made of a propritary mix of metals and ceramics to pack as many atoms as close together as possible to better conduct the magnitic field. It's so powerful a magnet that none of the crew is allowed to wear anything metal, can't have any fillings in their teeth, and metal objects in the room are stowed away before it's turned on. We learned that by hard experience. Oh, and the crew of the ship wanted me to thank you for the target practice.
If we ever do become a space faring species and are able to visit other worlds let's just make patterns in their crops and leave.