A drone shut England's second largest airport for 30 hours. Police think "eco-warriors" did it to highlight environmental problems. The drone made the airport close its runway. Over 120,000 travellers could not travel. They slept on the airport floor or went to other airports. Some passengers spent nine hours sitting on a plane.
The police want to stop people using drones. Drones could attack other important buildings or make a plane crash. Police tried many times to stop the drone. When they tried to reopen the airport, the drone came again. The police couldn't find the drone's user. The user could get five years in jail.