Ключевые слова: aerodrome, aeroplane, air, aircraft, antennae, architecture, arrival, aviation, background, blue, building, bulgaria, cloud, cloudscape, communication, control, controller, day, departure, dusk, flight, flying, jet, landing, light, nature, orange, plane, radar, radio, sky, skyline, sofia, summer, sun, sunlight, sunrise, sunset, technology, tower, traffic, transport, travel, yellow,