This documentary quite rightly won an Oscar for its efforts at showing the large scale exploration of Antartica undertaken by the United States military. The weather conditions were rather extreme, to put it mildly. I'd be curious to learn just how many cameras froze up during the expedition! The narration is capably handled by three prominent actors who also seved in the military during World War II and everything is very well-executed. Turner Classic Movies has been airing this fairly often in the last two or three years. Highly recommended.