(Paul Mirengoff) Katherine Herridge and Pamela Browne of Fox News are reporting that at least one of the emails on Hillary Clinton's private server contained extremely sensitive information identified by an intelligence agency as "HCS-O." This code is used for reporting on human intelligence sources in ongoing operations, according two of the Fox reporters' sources. Here is what a December 2013 policy document released by the Office of the Director of National
Source: Power Line