National Public Radio (NPR) is a free media organization. It is a nation syndicator to 797 public radio stations in the United States. It began in 1970. This was after the Public Broadcasting Act was passed in 1967. This act was signed by President Lyndon B. Johnson. NPR produces and spreads news and cultural programming. Most public radio stations broadcast some NPR programs. NPR is very popular. In 2005, NPR was voted the most trusted news source in the U.S.