Dan Rather announced Tuesday that he will step down as anchor and managing editor of the CBS Evening News in March, 24 years after his first broadcast in that position.

Rather will continue to work full-time at CBS News as a correspondent for both editions of 60 Minutes, as well as on other assignments for the news division.

CBS made no mention of a potential successor.

Rather, 73, has come under fire for his 60 Minutes report on President Bush's service in the National Guard during the Vietnam War. The report relied on documents that cast Mr. Bush's service in a negative light. Critics charged that the documents were forgeries, and CBS News was unable to vouch for their authenticity. An independent commission is now investigating the matter.

--CBS