Jake Carlini showcases a DIY project: building invisible ninja weapons with 3D printing! Cool, hidden weapons for backyard ...

For a while missiles looked like potential prey. They have thin skins and are packed with fuel and explosives. Merely damaging the shell of a supersonic missile can create drag, causing it to tumble ...

How to Make a Powerful Miniature Cannon - diy Guide - Learn to build a functional diy miniature cannon right in your workshop ...