This is an excellent vid on the life of Apollo Astronaut Collins, but if you already know who Collins is and only want the skinny on what's not told to the public, go to the 24 minute mark and listen to the last 2-3 minutes of the vid...
This man's statement about the back side of the moon lends even more credibility to Richard Hoaglan's book:
"Dark Missions: The Secret History of NASA" a New York Times bestseller about the strange history of NASA and its cover-ups regarding its origins and extraterrestrial architecture found on the moon.