NEW YORK (CBS) - Najibullah Zazi, the Denver man believed to be the central figure in a terror plot against the New York City transit system, has officially been indicted on charges of conspiracy to use weapons of mass destruction against persons or property in the United States, CBS 2 has learned. According to the Department of Justice, a federal grand jury in the Eastern District of New York returned a one-count indictment alleging that between Aug. 1, 2008 and Sept. 21, 2009, Zazi knowingly and intentionally conspired with others to use one or more weapons of mass destruction, specifically...