The US Marines have conducted drills with a mini unmanned aerial system (UAS) called Drone40 that could turn lethal when they attack in swarms. US Air Force Shares A Sneak Peek Of US B-21 Stealth Bomber That Could Send Shivers Across Russia & China It was in February 2021 when this miniature drone caught the … Continue reading Developed By Australia & Popularized By The UK, US Marines Test Lethal Mini ‘Grenade’ Drones That Can Attack In Swarms