The 1st time drones without pilots were used in 1973 in the Vietnam War when a plane went down and no person perished due to this new technology. Hobbyist drone pilots are still supposed to have a free course made available from the FAA and register their drones (also free) https://blockchain-news74815.amoblog.com/an-unbiased-view-of-diesel-power-generator-consumption-50022300