FLYING grenades could soon swoop across the world’s battlefields, obliterating anything in their path. The Drone-40 is an explosive charge with helicopter-style …
http://www.dronestagr.am/blog/terrifying-flying-grenade-drone-wipes-out-enemies-6-miles-away-and-can-even-loiter-in-sky-for-an-ambus-the-sun/