Drone Aid: A Troubling Shift.

Aid workers are training on the front lines of Ukraine's war-torn country, learning to react to the ever-present threat of drones. As they shout "Drone! Drone! Drone!" miniature helicopter blades buzz overhead, a chilling reminder of the dangers they face. But it's what comes next that sends shivers down their spines: "Attack! Attack! Attack!" - the sound of a grenade with propellers diving towards them. Will they make it out alive?