The Chamberlain Group is a manufacturer of garage door openers and associated equipment headquartered in Elmhurst, Illinois. It is a subsidiary of The Duchossois Group, a family business owned by Richard L. Duchossois. The company is among the largest manufacturers of residential garage door openers in the world, with its main competitor being Overhead Door Corporation .
Arlington International Racecourse is a horse race track in the Chicago suburb of Arlington Heights, Illinois. Horse racing in the Chicago region has been a popular sport since the early days of the city in the 1830s, and at one time Chicago had more horse racing tracks (six) than any other major metropolitan area. Arlington International was the site of the first thoroughbred race with a million-dollar purse in 1981. It is located near the Illinois Route 53 freeway.