The Second New Deal included a stepped-up program of public works, such as the Works Progress Administration, established in 1935. This government organization employed between 2 and 3 million people who worked at building bridges, roads, post offices, and airports. The Roosevelt administration was also responsible for social legislation that launched the American welfare state. In 1935, the Social Security Act created a system o f old-age pensions and unemployment insurance. The National Labor Relations Act of 1935 encouraged the rapid growth of labor unions.