They didn't. They destroyed fabricated evidence that because of advances in technology could easily prove they were faked.

There are also numerous instances where the tapes could have been used to prove the inages recorded on them could not possibly have originated with the lunar surface, like for instance the acceleration due to gravity.

I know most of you have seen those infamous images of Astronauts jumping from the last rung on the ladder down to the landing pad beneath it, but how many of you know that that single video can be used to prove it was hoaxed?

What we should have seen is is an fall rate that appeared easily noticeably much longer than ti takes to fall the same distance on Earth, and the fact is the only tapes that can be used as evidence are the original first generation tapes.

It could be proved beyond a shadow of a doubt that the tapes were made on earth.

If the astronauts (or objects) fall at any greater of a rate that 1/6th the acceleration due to gravity on Earth, it's fake. They fall at very close to half the acceleration due to gravity on Earth in all of the videos I have analyzed, meaning the frame rates were simply slowed to create an off-worldy appearance to the "moonwalks".

If these men were actually on the moon learning to walk with around @ 1/3th the weight and nearly twice the mass they were used to on Earth would have taken hours if not days. The fact is they would have been slipping and sliding and falling on their ass continuously because with their suits on they would have had twice the mass they did on Earth, but only half the weight, and most of that weight was positioned in a backpack that would have further made things difficult by putting their center of gravity well back form their hips.