Navajo humor

When NASA was preparing for the Apollo Project, they did some astronaut training on a Navajo Indian Reservation in Arizona. One day, a Navajo Elder and his son were herding sheep and came across the space crew. The old man, who spoke only Navajo, asked a question which his son translated.
 
"What are these guys in the big suits doing?"
 
A member of the crew said they were practicing for their trip to the Moon.  The old man got all excited and asked if he could send a message to the Moon with the astronauts. Recognizing a promotional opportunity for the spin-doctors, the NASA folks found a tape recorder. After the old man recorded his message they asked the son to translate it. He refused.

So, the NASA reps brought the tape to the reservation where the rest of the tribe listened and laughed but refused to translate the Elder's message to any people on the Moon.
 
Finally, the NASA crew called in an official government translator. He reported that the Moon message said, "Watch out for these bastards, they have come to steal your land."