Tomorrow is the 45th anniversary of the first moon landing, and tonight one of the men who was on that flight is on a new mission. Here's ABC's Jon donvan. One small step for man -- Reporter: There... See More
Tomorrow is the 45th anniversary of the first moon landing, and tonight one of the men who was on that flight is on a new mission. Here's ABC's Jon donvan. One small step for man -- Reporter: There were two ways to see it -- on the screen, blurry but closeup, or just by going outside and looking up, knowing that the moon you were looking at just then had two guys galavanting across its surface, leaving footprints. Either way it was, two overused terms, both out of this world and unforgettable as these voices are telling you now. I was 5 years old, and my mom swears she got me up and she put me in front of the TV with my other ten brothers and sisters. We were jumping in and out of the pool getting updates, did they walk yet. What a day that was. Reporter: All people responding to a campaign by this guy, buzz aldrin, the second man to set foot on the moon who wants to get people to remember. So the famous have been doing that and the not so famous -- I was sitting on the floor glued to the family TV. Reporter: And some who have no memory of it but are inspired anyway. Buzz aldrin, I want to be an astronaut when I grow up. Reporter: It is said that half a billion people did come away with real memories. That's how many watched when you count, say, Berlin, Paris, Tokyo and New York City and Indiana which is where don draper watched it. Okay, "Mad men," that's fiction. But here's the thing. This was not fiction. You know how? Tonight, go outside, look up, look hard. See? The footprints are still up there. Jon donvan, ABC news, Martha's vineyard.
This transcript has been automatically generated and may not be 100% accurate.