Decades-old found footage from NASA's abandoned Apollo 18 mission, where three American astronauts were sent on a secret expedition, reveals the reason the U.S. has never returned to the moon.
 
FUN FACT:  As Cdr. Walker's mental condition worsens, he mutters "Fate has ordained the men who went to the Moon to explore in peace remain on the Moon to rest in peace." This line paraphrases the beginning of a contingency speech, drafted by speech writer William Safire in a memo entitled "In Event of Moon Disaster," which was intended to be delivered by President Richard Nixon in the event that the Apollo 11 astronauts were stranded on the lunar surface without hope of rescue.