One episode of a programme about unique hotels, featured one which had a spectacular light show every night. The hotel was located in a large quarry and had both drones and a light show projected on to the quarry walls.
Thanks, Furyanimal, Your thread shows there's 5,000 drones in flight. It shows that drones are flown by businesses and average people. And it's not Chinese/Russian/space alien drones infiltrating US military bases.