From AI to interceptors, Ukraine is trying to drone-proof its skies

This week, with air raid warnings wailing in the distance, Kyiv held a funeral for two sisters. They had already lost their father who had been fighting on the front line. Their grieving mother is now the family's sole survivor. This is the human cost of the largest sustained Russian aerial assault so far - with 1,500 drones and 56 missiles fired at Ukraine within 48 hours. But the loss of life could have been even higher.