Not many people know about the U.S. Space Command, and that's because it was never meant to be in the spotlight. Instead, it works in the shadows, making sure that if a war were to break out in space, we would be ready. In the course of its duties, this special branch of the Air Force has determined that China may be a potential threat.

In "The Battle Above" – an episode of 60 Minutes airing on April 26 – the U.S. Space Command gave TV viewers a glimpse of what it does for the country. What a lot of people don't realize, in the United States and all over the world, is how many everyday activities rely on satellites in space.

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