Imagine a large number of American soldiers landing in enemy territory only to realize that they are in the wrong place, can’t find their way out, have no clue where their original target is, and have been left with little or no ability to communicate with their superiors back home. That’s not a completely unlikely scenario in a case where the Pentagon’s satellites have been destroyed, jammed, or otherwise tampered with. As one expert explains: “Every military operation that takes place in the world today is critically dependent on space in one way or another.” And if that doesn’t scare you, imagine not being able to get Howard Stern on SiriusXM, or your DirecTV going on the blink during Game of Thrones. WaPo’s Christian Davenport on the fight to protect the most valuable real estate in space.