When Walter Cronkite retired in 1981, Rather was promoted to news anchor for the CBS Evening News, a role he occupied for 24 years. Along with Peter Jennings at ABC News and Tom Brokaw at NBC News, Rather was one of the "Big Three" nightly news anchors in the U. S. from the 1980s through the early 2000s. He also frequently contributed to CBS's weekly news magazine 60 Minutes. Within a year of Brokaw's retirement and Jennings' death, Rather also left the anchor desk in 2005 following a controversy in which he presented unauthenticated documents in a news report on President George W. Bush's Vietnam-era service in the National Guard. After his departure from CBS Evening News, he continued to work with CBS until 2006.