Ключевые слова: 21, air, aircraft, airplane, airport, aviation, barrier, ber, berlin, board, bound, brandenburg, brandt, building, business, city, construction, control, design, destination, editorial, fly, germany, international, marketing, metropolis, new, outdoor, passenger, plans, project, schedule, schoenefeld, site, strike, terminal, tourism, tower, traffic, transport, transportation, travel, was standing, willy,