Yes, of course. Twelve men did, to be precise.
Is there any doubt? Well, apparently, according to a conversation I had with a pal from Australia a few days ago. Despite being an intelligent bloke in his mid-40s, he is totally convinced that the whole thing was faked, having read some "evidence" on the Internet.
Which brings me to my point. The great thing about the Internet is that it allows everyone to express a view. The bad thing about the Internet is - er - that it allows everyone to express a view. Without getting into a philosophical discussion about "what is truth", I'd just like anyone viewing a "conspiracy theory" website to take a pause for thought. Conspiracies, of their very nature, require groups of people to act together and not reveal their activities to others. The more people involved (or the more complex the alleged conspiracy), the more difficult it is for everyone to keep the secret. In fact, it doesn't happen. Someone always gives the game away, for reasons of conscience, bravado, or money.
So, the moon landings did happen, there is no New World Order and the planet is not governed by shape-shifting lizards. What we see really is what we get.