Today's Takeaways: Playing Politics With Energy, Following a Space Trail, and Washington's Secret History

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Artist depiction of Philae touching down on the comet 67P/Churyumov-Gerasimenko
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1. Fighting the 'Pure Evil' of ISIS | 2. After Years in Limbo, Senate to Vote on Keystone XL | 3. Following Philae Through the Universe | 4. The Secret & Disturbing History of Washington D.C.