Drones are like airplanes, only without a pilot. No one without a pilot's license should be allowed to have one.
Something bad or unexpected can happen when people send up a self-controlled flying machine like a drone without knowing how to really control it. Drones can become flyaways, and can be caught up on a jet stream (喷气流) and blown away. A falling drone can do much damage (损害) to buildings and people.
Though drones can be harmful, they can be very helpful.
At a sports event, drones can be used to give the spectators (观众) a view from above or help coaches see how their players are doing.
They are also becoming a useful tool for firefighters, helping them find and fight wildfires. Drones can watch secretly on populations of animals in the wild, especially endangered ones.
In some faraway places in the world, drones are the fastest way to send medicine to people who are in great need of it.
Some people think drones can only be used by governments to help when needed. Others think that if rules are obeyed, there should be little risk to people and property (财产).
Drone makers say drones are exciting new technology and that the future will be controlled by them.
