I'm an Apollo nut, and have read all the books in print written by or about the astronauts and the people that led the effort on the ground, like Chris Kraft, Bob Gilruth, Von Braun, Tom Kelly, Max Faget and others. Apollo was developed and performed in full public view all the way, with reporters and camera around every corner, as opposed to the Soviet effort, where nobody knew there was a launch until it was already over. There were 400,000 people involved in Apollo, and not one person, in 30 years, has ever put out a substantially different story. There is no doubt, the moonlandings happened, and the books that are available, written by people who were there, would give you an amazing story of how they did it, step by step.
The reason why nobody went back there afterwards was a result of the reason why we went in the first place. Kennedy called for a crash program to get to the moon and back within 9 years. Apollo accomplished the mission, but with single-minded purpose. Get there, and come back. The only thing that came back to earth out of the entire nearly 400-foot Saturn V stack was the tiny command module. Extremely inefficient and wasteful. But it worked, and served the purpose for which it was designed within the timeframe alloted by Kennedy.
NASA actually did not want the job. NASA wanted a slower but steadier approach, first developing a space station, then a space shuttle to go back and forth between the earth and the station, and the station to be used as a base from which to send missions to the moon using far larger vehicles than what was possible from a single Saturn V launch from earth. Apollo was a shortchut to bypass the station and the shuttle.
After Apollo came Skylab, and the Space Shuttle was then designed to shuttle between the Earth and Skylab, at least to start with. But the shuttle fell behind schedule, and Skylab fell back to Earth in 1979, so the Shuttle had no place to shuttle back and forth between. Finally with the ISS, it has a job for which it was originally designed (and was proposed by NASA back in 1960-61).
The problem with ISS is that it is a mish-mash of parts from everywhere, and has a difficult time simply staying in one piece. If man wants to go to Mars, it would require a far larger earth-launched vehicle than even the Saturn V, or you could make numerous smaller lauches (using Shuttles) and assemple the pieces at the station (Earth Orbit Rendezvous). But this assumes that the station is more than some floundering space whale, but is a place where there are workshops, maintainance and repair facilities, research and testing labs, etc. I.E., we are talking about a space station far more advanced than ISS.
The only thing you should feel when shooting a terrorist: Recoil.