The last full-size Kmart store in the continental U.S. is set to close in October, marking the end of the line for the retailer once known for its "Blue Light Specials." Why it matters: After the Bridgehampton,

Kmart, the once giant retailer with headquarters in one of Chicago’s northwest suburbs, is reportedly closing its last full-scale store in the mainland United States.

The last full-sized Kmart store in the U.S., located in Bridgehampton, N.Y., will close on Oct. 20, marking the end of an era.