(Sep. 27, 2005) -- Dan Rather says CBS wouldn't allow him to do a follow-up story on Bush's Texas Air National Guard (TANG) files.

Speaking at the National Press Club on September 26, former CBS News anchor Dan Rather responded to a question posed by moderator Marvin Kalb concerning the controversial TANG files of George W. Bush.

Kalb asked Rather why he did not return to the story and investigate those who created the guard files, passed them off to a former TANG officer and hence to CBS's 60 Minutes, and tipped off right-wing bloggers before the airing of the pre-2004 election exposé by 60 Minutes.

Rather responded, "You'll have to ask CBS that question."

Rather stated it was his desire to continue to delve into the story and the set-up.

According to CBS insiders, the original TANG files were scanned by GOP dirty tricks operatives using a sophisticated text scanner that changed the original IBM typewriter Courier font to a Times Roman font, automatically created a "th" superscript for date numbers, and created margins and pagination.