Amazon Prime Air is now operating in Lockeford, Calif. and College Station, Texas, delivering a small number of packages just in time for Christmas.Lockeford is a small, rural town of about 3,500 residents located about 50 miles southeast of Sacramento and just northwest of Stockton, making it an ideal location to pilot drone delivery.We are starting in these communities and will gradually expand deliveries to more customers over time,” Natalie Banke, Amazon Air spokesperson told KTXL Fox 40 in Sacramento, which first reported the launch of Prime Air.Amazon is using a hexagonal MK27-2 delivery drone with six propellors that are designed to minimize high-frequency sound waves.While the drones fly autonomously, using algorithms to avoid obstacles like power lines and chimneys, Amazon is currently keeping tabs on deliveries with human eyes."