Cleveland City Center is in the heart of the business district, within the stately marble Fifth Third Bank Building. Recently expanded, the center now occupies the entire 13th floor, and has been completely remodeled and updated. The building is located a short distance from Freeways I-90, I-77 and I-71 and both Cleveland airports, and within walking distance are restaurants, banks and other amenities. Diversifying beyond the manufacture of steel and other goods, Cleveland now houses the corporate headquarters of many large companies in the technology and aerospace sector and NASA's Glenn Research Center. Several finance, insurance and information companies each employs over 1,000 people.