Drones are popping up everywhere. They've been largely unfamiliar in India, but that's changing. The police department in Lucknow, a populous city in the country, is the first to purchase five weaponized drones that can spray pepper on a rioting mob. The concept of aerial robots isn't entirely new to the city, as they've been used for surveillance and imagery during religious festivities in the past, but this new substance-carrying variety is a novelty. Each one costs about $9,600 and can carry a load of 4.4 pounds.