They say that if you watch the videos, you will notice that the shadows go in two directions as if there were two lights shining on it, like in a studio. If you think about it, during the day, on Earth, the sun causes shadows. At night, the moon causes shadows. On the moon, the sun can be shining on it to make one light source. If the moon is close enough to make shadows on Earth then Earth must be close enough to make shadows on the moon. Therefore, I believe that the two light sources are the sun and Earth and the theory that there can only be one light source on the moon is wrong. I think that the landing on the moon was real. If they actually didn't land on the moon, I don't think that space travel would be as possible or as safe as it is now. (it isn't very safe but it would be less safe) That is my theory.