https://www.cnet.com/news/senators-ask-facebook-twitter-google-to-block-3d-printed-gun-blueprints/ > Lawmakers are asking the tech industry's heavy hitters to ban online distribution of designs for 3D-printed guns. > Five Democratic senators on Tuesday sent letters to Twitter, Facebook, Microsoft, Craigslist, Google, Reddit and Yahoo asking the companies to block blueprints for 3D-printed guns on their platforms.