Hard choices and challenges follow triumph

Barack Obama pledged to end the war in Iraq and defeat al-Qaida and the Taliban in Afghanistan. He ran on a platform to change the country and its politics. Now he must begin to spell out how.

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Obama to take break to see sick grandmother

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A last refuge for life remained after extinction

What is now Ellsmere Island in the Canadian Arctic archipelago was once a last refuge for life during the Earth's worst extinction event 250 million years ago, say scientists who have discovered a surprising trove of ancient fossils there.

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