I've been re-reading 1984, and something I read yesterday was relevant to an article in today's New York Times that describes how some of the interrogation training at Guantanamo was based on Chinese torture methods used on American airmen in Korea in the 1950s. In the article, a Department of Defense spokesman says:
“I can’t speculate on previous decisions that may have been made prior to current D.O.D. policy on interrogations. I can tell you that current D.O.D. policy is clear — we treat all detainees humanely.”
In 1984, the protagonist, WIlson, says the nation of Oceania was once at war with Eastasia and in alliance with Eurasia. But Oceania is now at war with Eurasia and in alliance with Eastasia.
"Officially the change of partners had never happened. Oceania was at war with Eurasia: Therefore Oceania had always been at war with Eurasia." (Chapter 1, part 3.)
Leaving aside whether torture is still being used, the D.O.D. spokesman seems to be saying that since the official policy is for humane treatment, he can't acnkowledge that inhumane treatment ever occured. Not quite the same as 1984 (in which the government alters the historical record whenever there is a change of policy so that the new policy is actually the policy that has existed forever), but close enough.