Ключевые слова: aircraft, america, architecture, beautiful, blue, building, buildings, business, chicago, city, cityscape, clouds, days, destinations, district, downtown, exterior, facade, famous, finance, financial, glass, high, highrise, illinois, landmark, looking, loop, metropolis, modern, office, outdoors, plane, sears, sky, skyline, skyscraper, skyscrapers, states, tall, the, tower, travel, united, up, urban, us, usa, view, willis,