Millions of miles from Earth, two astronauts hover weightlessly next to a giant space rock, selecting pebbles for scientific research. The spaceship where they'll sleep floats just overhead. Beyond it, barely visible in the sky, is a glittering speck. It's Earth.It sounds like a science-fiction movie, but this surreal scene could, if President Obama has his way, become a reality. However, unlike Hollywood depictions in such movies as Armageddon, it's going to be a lot harder to pull off, writes Traci Watson in an intriguing story for USA Today.
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