You'd have to take him there without his ever having the impression that it's a hoax (you know the Apollo astronauts never left the planet, instead they were taken to a secret base where they were told they were on the moon? They even believed it (or maybe they were part of the conspiracy)).
I wonder if they people who actually came up with this believe it? This sort of reminds me of the crap people came up with during the assination of JFK. I mean, some were logical, but a few were close to saying there was an alien hiding in the bush. I bet some people believed this who read it. Just like the time in California when some guy said aliens were coming to get them, so a bunch killed themselves.