Drones, also called unmanned aerial vehicles and remotely piloted aircraft systems, pose an urgent global issue for aviation nowadays. The aftermath of drone strike can be fatal.Just imagine, what may happen if a drone, which is metal object, strikes a leading edge of a wing.It will definitely cripple movable parts of the wing. If it is injested into an engine, it will cause engine popping, engine failure, engine fire.. Drones are normally restricted from flying higher than 400ft or out of sight of the operator, and it is a criminal offence to fly anywhere near a plane. Operators breaking the rules by flying close to a plane can potentially be convicted of endangering an aircraft which carries a maximum jail sentence of 5 years.(in UK) The pilot of the British Airways A320 from Stockholm to London saw large black drone with 'bulbous' camera fly just 50ft under the plane's nose as it came into land at Heathrow. The near miss on March 15 with the plane flying at 280mph was rated as the highest risk,category A