This movie is based on the Conspiracy Theory that US never landed men on to the moon, and that the whole claim is a hoax. In the movie, NASA proclaims that it is sending three men to Mars, and the story unfolds from there on. The helicopter / plane stunt towards the end of the movie is breath-taking. What amazes me is that in 1977, there were that-much-skilled pilots. The ambition of the stunt director of that movie is remarkable.