Just the Facts
FactCheck.org succinctly sums up the whole package of documents released on 60 Minutes.

• May 4, 1972: In a memo addressed to Bush, Killian says "you are ordered to report" by May 14 "to conduct annual physical examination (flight)" in accordance with regulations. Bush never showed up for that exam.
  


• May 19, 1972: Five days after failing to report for the physical, Killian wrote a memo regarding a telephone call Bush made to him. "Discussed options of how Bush can get out of coming to drill from now through November. . . .  We talked about him getting his flight physical situation fixed before his date. Says he will do that in Alabama if he stays in flight status. . . . I advised him of our investment in him and his commitment" (This is an apparent reference to the Guard's investment in Bush's flight training, and Bush's signed commitment to attend drills and to serve a full six years in the Guard).  Killian said he told Bush he would need a written document accepting Bush into an Alabama unit before he would approve a transfer, and added, "think he's also talking to someone upstairs." (emphasis added).
  


• August 1, 1972: "On this date I ordered that 1st Lt. Bush be suspended from flight status due to failure to perform to the USAF/TexANG (US Air Force/Texas Air National Guard) standards and failure to meet annual physical examination (flight) as required. . . .  Officer (Bush) has made no attempt to meet his training certification or flight physical.  . . .  I also suggested that we fill this critical billet with a more seasoned pilot from the list of Vietnam pilots that have rotated." (emphasis added).
  


• August 18, 1973: (a year later) Killian says Col. Buck Staudt, the man in charge of the Texas Air National Guard and a supporter of the Bush family, is applying pressure to "sugar coat" the annual evaluation of Bush. "Staudt has obviously pressured (Bobby) Hodges (Killian's immediate superior in the Houston Guard unit) more about Bush. I'm having trouble running interference and doing my job. (Lt. Col. William D.) Harris (another of Bush's supervisors) gave me a message today  (regarding Bush's annual evaluation) Staudt is pushing to sugar coat it: Bush wasn't here during rating period and I don't have any feedback from 187th in Alabama. I will not rate. . . . I'll backdate but won't rate. Harris agrees." Bush's annual evaluation, signed by Harris and Killian, says "Lt. Bush has not been observed at this unit during the period of report. " It is dated May 2, though this new memo suggests that it was actually written later and the date was falsified to dress up Bush's file as he was preparing to leave the Guard to attend graduate school. Killian was clearly not happy with the situation: he wrote the subject of the memo was "CYA," military slang for "cover your ass." (emphasis added).