2021 Is the Year the Small Drone Arms Race Heats Up

Jamming drones, or even blasting them out of the sky, might work fine over the strait of Hormuz or the desert sands of Syria, but it’s a tricker proposition in the cities where the military expects to fight. Just finding them is a big problem. Small drones are often too small for radar, too cool for thermal sensors, and too soft for sound detectors. One promising approach combines detection and defense: hijacking radio control signals.