San Bernardino is the county seat of San Bernardino County, California. San Bernardino's estimated population, as of 2006, is 205,010. As of 2006, it was the 18th largest city in California, and the 101st largest city in the United States.. San Bernardino is part of the Riverside-San Bernardino-Ontario Metropolitan Area, the 14th largest metro in the nation, commonly referred to as the "Inland Empire. San Bernardino held the Miss Teen USA 1988 and also the Miss Teen USA 1989. San Bernardino has three major events, the annual Route 66 Rendezvous, a multi-day classic automobile event held in downtown San Bernardino each September, the National Orange Show, held each April/May, and the Western Regional Little League Championships each August. The world's largest fast food chain, McDonald's, began in the city in 1940 by brothers Dick and Mac McDonald.Though the closing of Norton Air Force Base and Kaiser Steel, as well as the relocation of railroad jobs in the 1980s and 1990s had a large impact on the economy and culture of the city, new industrial development is occurring near the San Bernardino International Airport. Though traditional retail and office areas such as downtown and Highland Avenue have suffered, the City is seeing growth along its south-end focused on Hospitality Lane. Though much of the housing stock is, on the average, older than the surrounding region, new homes continue to be built in different parts of the City, with the bulk on the north-end in the Verdemont area.