A Falcon 9 SpaceX rocket stands ready for a sunset launch from complex 40 at the Cape Canaveral Air Force Station in Cape Canaveral, Fla., on Sunday. It will be carrying aloft the DSCOVR satellite. John Raoux/AP hide caption

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NASA says this "blue marble" image is the most detailed true-color image of the entire Earth to date. NASA hide caption

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Former Vice President Al Gore. Jon Kalish/NPR hide caption

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Who will be Romney's VP? The naming of his running mate is likely going to come in mid-August, after his foreign trip and the conclusion of the Olympics. Ken Rudin collection hide caption

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