The idea that Nixon would have had a back-up moon landing tape made is plausible -- Nixon was the sort of slimeball that would have done that.
Would Rumsfeld, Haig, and Kissinger been willing participants? That is very plausible.

I always thought Former CIA Director William J. Casey's death was suspicious http://educationforum.ipbhost.com/in...96&#entry83187
So, was Former CIA Director Vernon A. Walters ''silenced?"

http://en.wikipedia.org/wiki/Vernon_...ment_and_death

Quote:

''Dark Side of the Moon (mockumentary) http://en.wikipedia.org/wiki/Dark_Si...ockumentary%29 Dark Side of the Moon is a French mockumentary by director William Karel which originally aired on Arte in 2002 with the title Opération Lune. The basic premise for the film is the theory that the television footage from the Apollo 11 Moon landing was faked and actually recorded in a studio by the CIA with help from director Stanley Kubrick. It features some surprising guest appearances, most notably by Donald Rumsfeld, Dr. Henry Kissinger, Alexander Haig, Vernon Walters, Buzz Aldrin and Stanley Kubrick's widow, Christiane Kubrick.''

Dark Side of the Moon was a joke, sarcasm -- a mockumentary. (A satirical television or radio programme in the form of a parody of a documentary.)