On September 1, Warren Mitofsky died, in New York city, at the age of either 71 or 72. In 1967, while he was working for CBS News, he conceived of the idea of hiring vast numbers of individuals to station themselves outside certain polling places, and ask voters (after they had voted) how they had voted. The method depended on sophisticated sampling analysis. Exit polling has spread around the world. Mitofsky was not retired, and had been working on techniques for the 2006 U.S. congressional election on the very day he died.