<p>September 10, 2004 -- THE populist revolu tion against the so- called mainstream media continues. Yesterday, the citizen journalists who produce blogs on the Internet — and their engaged readers — engaged in the wholesale exposure of what appears to be a presidential-year dirty trick against George W. Bush. What the bloggers and their audiences did was call into profound question the authenticity of four documents proudly trumpeted by CBS News in a much-heralded investigative report on Wednesday night's edition of "60 Minutes" about the president's National Guard service in the early 1970s.</p>