Killian documents controversy

The Killian documents controversy (also referred to as Memogate or Rathergate) involved six documents containing false allegations about President George W. Bush's service in the Texas Air National Guard in 1972–73, allegedly typed in 1973. Dan Rather presented four of these documents as authentic in a 60 Minutes II broadcast aired by CBS on September 8, 2004, less than two months before the 2004 presidential election, but it was later found that CBS had failed to authenticate them.

Source: Wikipedia — Killian documents controversy (CC BY-SA 4.0)