Ключевые слова: aerial, aerodrome, aeroplane, air, aircraft, area, attention, aviation, background, ban, camera, caution, concept, control, danger, disallow, drone, fence, flight, fly, flying, forbidden, helicopter, illegal, military, no, notice, outdoors, outside, plane, prohibited, prohibition, red, regulation, remote, restricted, safety, security, signs, sky, spy, stop, sunset, surveillance, symbol, technology, unmanned, warning, warning sign, zone,