Conversation so far:
what were the killian documents?
The Killian documents controversy involved six documents that are critical of President George W. Bush's service in the Texas Air National Guard in 1972–73
why were the killian documents important?
Rather presented Killian 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

Question: what info did the contain?
Self-contained rewrite: what info did the killian documents contain?