The U.S. military’s mad scientist division, the Defense Advanced Research Projects Agency (DARPA), has unveiled a new counter-drone system designed to protect convoys on the move. The system, known as Mobile Force Protection, launches a drone to intercept other small unmanned aerial systems (sUAS). The drone sprays pink material that looks like silly string, forcing the attacking drone to crash. The system was developed to specifically deal with threats that do not rely on a radio or GPS receiver for their operation.