Space is one of the hardest global policy issues, and one where a failure of imagination can create irreparable ruin. For example, a 2007 anti-satellite missile launch by China created a debris cloud that will last for centuries.
You may think it's a bad thing that huge chunks of metal periodically fall out of the sky, but have you ever thought about the ones that don't come crashing down to Earth? That's right. There's an ever-growing amount of space junk in constant orbit around our little planet.