The pier housed a spacious dance hall, two carousels, an exhibit of premature babies in incubators at Frederick House, the Crooked House fun house, the Grand Electric Railroad, the Starland Vaudeville Theater, Breaker's Restaurant, and a Panama Canal model exhibit. It too burned within the year. A new charter was adopted in 1914 that converted the city government to a commission form. This proved to be very weak, especially since the police commissioner was poorly paid and had no accountability. Auto racing became popular. Drivers would race an 8.4-mile loop made up of city streets. The Free-For-All Race was conducted between 1910 and 1912. The United States Grand Prix was held in Santa Monica in 1914 and 1916, awarding the American Grand Prize and the Vanderbilt Cup trophies. By 1919, the events were attracting 100,000 people, at which point the city halted them. 1920s Donald Wills Douglas, Sr. founded the Douglas Aircraft Company in 1921 with his first plant on Wilshire Boulevard. He built a plant in 1922 at Clover Field (Santa Monica Airport), which was in use for 46 years. In 1924, four Douglas-built planes took off from Clover Field to attempt the first aerial circumnavigation of the world. Two planes made it back, after having covered 27,553 miles in 175 days, and were greeted on their return September 23, 1924, by a crowd of 200,000 (generously estimated). The Douglas Company (later McDonnell Douglas) kept facilities in the city until 1975. The entire facility was demolished and removed by 1977. In 1922, a local newspaper, discussing African Americans, stated "We don't want you here; now and forever, this is to be a white man's town". The nationwide prosperity of the 1920s was felt in Santa Monica. The population increased from 15,000 to 32,000 at the end of the decade. Downtown saw a construction boom with many important buildings going up such as Henshey's Department Store (destroyed) and the Criterion Theater. Elegant resorts were opened, including the 1925 Miramar Hotel and the 1926 Club Casa del Mar. The Los Angeles firm of Walker & Eisen designed the art deco Bay City Building, a 13-story skyscraper topped with a huge four-faced clock that was finished in 1930. Beach volleyball is believed to have been developed in Santa Monica during this time. Duke Kahanamoku brought a form of the game with him from Hawaii when he took a job as athletic director