You Want Your Proof
(I might have posted about this before, but I figured I'd get more in depth into it this time around.)
There are two types of people out there right now. Those that believe in our space program...and those that do not believe in our space program. Now this does not mean, have confidence in NASA, but more so actually believe the things NASA has done.
Oh we never landed on the moon, it was just a publicity stunt to get America back together during rough times. Hahaha, really? That is what I am talking about. The age old "snap-back" response to asking thsoe that do not believe in NASA; "Why don't you think we landed on the moon?" It is very sad I must say. Those individuals want their proof...but at the same time, you can see in their eyes and hear it in their voices; they do not want to know the truth. That is why they all ask the same questions and say the same things about it all.
So, let us take a look at why these folks think we did NOT land on the moon:
1. The shadows in the photography are coming from more than 1 angle.
2. Why haven't we gone back again?
3. It was just a stunt to get America back together during rough times.
Okay, so those are the 3 main reasons/questions they have regarding the Apollo missions (those were the missions that were meant for traveling to the moon). So let me give you a brief rundown of the Apollo missions. 
Apollo 1, never left the ground, the cock pit sparked a fire during a routine run through and burned all 3 of the occupants completely. The Apollo mission was put off. Apollos 2-6 were supposed to happen during the time the mission was put on hold. Apollo 7-10 either orbited Earth or the Moon (or both) to make sure everything was in working order and to find a spot to land. Apollo 11 was the first to land on the moon (most of us know this), Apollo 12 landed, Apollo 13 (if you haven't seen the movie) had a failed oxygen tank ruining their trip to the moon and barely made it back in one piece. Apollos 14-17 all landed on the moon.

Now, I suppose I will answer their 3 questions...1) Yes the shadows in some of the photography and cinematography are coming from other directions. Why? It is rather simple. The vessel in which they landed on the moon had a reflective thin shield to protect the jets and fuselage from the heat of the sun and dust particles around in space and on the moon. What it basically looks like is a copper/silver blanket but it is EXTREMELY shiny, therefor it creates yet another 2-4 different angles for the light from the sun to be reflected and even refracted from. Now...you have up to 5 (FIVE) different angles in which can create shadows. 
2) The reason we have not gone back to the moon since Apollo 17 is easier than you think. FUNDING. Everyone then quickly throws back; that's bullshit, we have the money for it, we never went in the first place blah blah blah. Please...save your breath. The cost for ONE Apollo mission that did NOT go to the moon was over 200 Million dollars. $200,000,000.00<-------see that? And that is just how much is cost to actually put the Saturn V rocket into Earth's orbit...not to get to the moon, land on it, blast off from it, make it back to Earth, and still be alive to tell about it. That cost went around 600-800 Million dollars. So...why have we not gone back? Funding, just because our country has a shit load of money...does not mean they want to spend it on the space program. They have to get permission from the government to put people out in space you know. 
3) Bring America close together in rough times...that is rather funny. Putting people out in space and on the moon does not bring others closer together...look what it did to us really. I am sitting here proving to you "nay-sayers" that it DID actually happen. Sure we were going through a rather rough time in politics, socialism, and the military but do you honestly think that the government would fund BILLIONS of dollars to NASA to put people on the moon? No. To also make you feel better, http://www.space.com has news of NASA sending a probe to the moon to take photos of the landing sites with the lower part of lunar module still sitting there on the moon for you "nay-sayers". So, have fun with that.
I did not post this to bitch anyone out or point anyone out for the soul purpose of self-gratification. I did it merely to prove to those "nay-sayers" that we did in fact land on the moon. Read my facts, check more into this before you say anything about us NOT landing on the moon. Thank you.