CAMBRIDGE, Mass. (AP) — Four Associated Press reporters have won the Goldsmith Prize for Investigative Reporting for a series of stories about the New York Police Department's surveillance of Muslims in the city and beyond after Sept. 11.Matt Apuzzo, Adam Goldman, Chris Hawley and Eileen Sullivan share the $25,000 prize for their extensive reporting on the clandestine programs that monitored and recorded life in Muslim communities.The AP's stories have led lawmakers in Washington to call for House Judiciary Committee and Justice Department investigations.The NYPD says the monitoring was legal and necessary to keep the city safe from another terrorism attack.The award was announced at a ceremony at Harvard University on Tuesday.The prize has been given out since 1991 by the Joan Shorenstein Center on the Press, Politics and Public Policy at Harvard University's Kennedy School of Government.