NEW DELHI/ISLAMABAD (Reuters) – A little after 8:00 pm on May 8, red flares streaked through the night sky over the northern Indian city of Jammu as its air-defence systems opened fire on drones from neighbouring Pakistan. The Indian and Pakistani militaries have deployed high-end fighter jets, conventional missiles and artillery during decades of clashes, but the four days of fighting in May marked the first time New Delhi and Islamabad utilized unmanned aerial vehicles at scale against each other.