Link 1: https://www.digitaltrends.com/cool-tech/amazon-prime-air-delivery-drones-history-progress/
Link 2: https://money.cnn.com/2017/06/23/technology/amazon-drone-beehives/index.html
Link 3: https://www.bbc.com/news/world-south-asia-10713898
Link 4: https://www.military.com/equipment/drones