@Haseri
The moon sets were damaged in a fire shortly before the Apollo 13 "landing", which is why we had to fake the whole explosion, accident thing. The sets were rebuilt, and we managed to get four more "missions" done.
The problem is that soon after Apollo 17, the spacecraft set was damaged by a falling crane, and we were never able to build it back to look convincing enough. That's why we started work on another "spacecraft", the shuttle. Those models worked well for a while, but they're showing their age now.
Our Constellation program is going to be done with computer graphics from the beginning. This way, we don't have to worry about sets and models. The hardest part will be getting the footage of the space station model to match up with the CGI Orion capsule. That's part of the reason they announced that the station will be "deorbited" soon after the the first flight of Orion.
Dr. Razark
NASA, Johnson Space Center
Oh, the reason it'll take us until 2020 to get back to the "moon" is because camera technology has improved so much that we need time to get the details right, and the longer we stretch it out, the longer we get funding. It's a fine balance between pretending to spend enough that they funds, and pretending to spend too much that we get cut.
Edit:
Forgot to mention, the damaged set after Apollo 17 was the Lunar Module set. That's why we were able to fake the Skylab missions, using the remaining capsule set. We also used it to fake the Apollo-Soyuz mission with the Soviets.
We got the Soviets to go along with the whole thing by pulling out of the Vietnam War and letting them take over. We also told them they could have Afghanistan. Nixon had to erase the 18 minutes of the recording where he was discussing this. The whole Watergate break-in was simply to distract people from the fact that there was something sinister going on. Later, the Soviets were making noises about revealing that it was all faked and cutting off the CIA's access to cheap heroin, which they were trading for cocaine in Columbia, to sell in the U.S., to raise money to support the mujahideen, so we started supplying the mujahideen to keep them quiet. Christa McAuliffe managed to find out about a lot of the goings on, and was reluctant to take the bribes we offered to keep her quiet, so we stuck her into Challenger and actually launched her in it. To make sure she wouldn't talk, we then used the same type of invisible missile that took down TWA 800. Since then, we have been very careful to choose only loyal people to play astronauts.
Even with the safeguards in place to choose loyal people, Ilan Ramon managed to get into the program. We discovered that he was one of those crazy communist Zionists working undercover for the Mossad. He had enough information to blow our cover wide open in retaliation for our support of Islamic mujahideen in Afghanistan against his true masters at the KGB. We made sure that Mossad got the message that we weren't to be messed with by destroying Columbia over Palestine, Texas. Of course, the invisible missile didn't have the ability to take down a shuttle at this altitude, so we had to use one of the new vehicles we built by reverse engineering the UFO from Roswell. The aliens were very helpful in teaching us to adapt the technology to our lesser earth materials.
Of course, it's a good thing the Illuminati killed Kennedy when they did, allowing the reptillian in disguise, Johnson, to take over. If JFK had stayed in power, he probably would have made us skip the whole conspiracy and actually land on the moon. As if something like that would ever happen.