Alien Structures on the Moon?

URL: http://locklip.com/pyramids-and-alien-structures-on-the-moon-a-cover-up-like-no-other/

URL: http://www.inquisitr.com/1976988/multiple-alien-ufo-bases-and-structures-found-on-the-moon-ufo-researcher-claims/

A new age dawned upon us when man first set foot on the Moon. Though, recent articles have shown NASA covering up pictures by airbrushing them, in order to hide sensitive information from Apollo 17. Even missing tapes from Apollo 11 seemed a bit sketchy. Pictures of the Moon, tooken on the Moon itself and from space have been analyzed, and clearly shows figures that seem to stretch upward, casting a shadow upon the Moon's surface, like any building would do on Earth. The shadows casted on the Lunar's surface have been said to be "artifacts from digitally photographed software" but UFO and anomaly hunters respond by saying, "what sort of 'artifacts from the digital photography software' generate wedge-shaped structures with lights arranged in what appear perfect symmetrical order". I believe deeply that the structures could infect show alien like life on the Moon, if not, then why hasn't NASA returned to the moon since Apollo 17, and so secretive about the lost footage. What is the need for airbrushing photos and altering audio clips from the missions to the Moon?