ABCNEWS.com : Why Does the U.S. Flag on the Moon Have Ripples?

"The wrong coating had been applied to the telescoping rod, so it wouldn't fully extend, which is why the flag looks like it is waving in the wind. Ironically, that famous picture of Buzz Aldrin posing next to the flag is often cited as evidence by conspiracy theorists as proof the mission to the moon was a hoax. "