Hangar 1: The UFO Files S02E04 Far Side of the Moon

Hangar 1 files reveal top-secret evidence that indicates the government has been operating bases on the Moon and Mars. Some of this evidence dates back to the 1950's and suggests that NASA may be behind a long existing, secret mission to establish off-planet outposts. If these bases do exist, what is their purpose and why are they being kept a secret?