You are using an out of date browser. It may not display this or other websites correctly. You should upgrade or use an alternative browser.
alternatehistory.com
Basically what it says on the tin.
Obviously the largest changes would be after 1976. Goverment support and USA prestige plummeted after the reveal. WI that doesn't happen?
As for the changes before 1976, if the astronauts actually landed on the moon in 1969 would the be anything of value exploitable with that level of technology? Perhaps some weapon instalations in the context of Cold War?
OOC: Assume the first moon landing took place in 1993 and there was few to none follow-up missions.