A drone shut England's largest airport for 30 hours this . Police think "eco-warriors" used the drone to raise of environmental . The drone stopped airplanes leaving the UK's over two . It had to close its runway. Over 120,000 were affected. They had to sleep on the airport or go to other airports. Some passengers spent nine sitting on a plane near the boarding .
The police want to stop people using drones to cause . They are worried drones could attack airports and important . Police tried many to stop the drone. They said: "When we look to reopen the airfield, the drone reappears ." The police and the British Army couldn't find the drone's . They are worried a drone could make a crash. The of the drone could get five years in .