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