Helicopter flying over the Chicago skyline

Day, Business, 4k, City, Urban, Buildings, Center, Office, Sunrise, Sunset, Sun, North, Downtown, Rooftop, America, Flight, Up, Skyscrapers, Apartment, Effects, Horizon, Air, Tall, Dirty, Golden, Quality, Down, Biggest, Helicopter, Dusk, Losangeles, Twilight, Rush, Population, Rise, Pollution, Afternoon, Dangerous, Large, Newyork, Haze, Smog, Noon, Mid, Hazardous, Below, Chicago, Illinois, Cooperate