Police responded to a huge teen gathering in downtown Chicago last night that took over several of the Loop's busy streets and sidewalks. Video from Citizen App shows police flooding the area on bikes as at least one person was being loaded into an ambulance, and several others being taken away in handcuffs. Similar gatherings are familiar scenes in Chicago as the weather gets warm, with some aldermen pushing for a stricter and earlier teen curfew. #chicagoloop #downtownchicago #chicago #crowd #chicagopolice