In 1954, Grand Forks was chosen as the site for an Air Force base. Grand Forks Air Force Base brought thousands of new jobs and residents to the community. The military base and the University of North Dakota became integral to the city's economy. With construction of federal highways, during the postwar years residential and business development became suburbanized, spreading to new areas as land was available. Interstate 29 was built on the western side of the city, and two enclosed shopping malls – South Forks Plaza and Columbia Mall – were built on the south side.