An image showing the final front page of The International Herald Tribune, published Monday Oct. 14. The newspaper will become The International New York Times Tuesday. New York Times hide caption

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President Obama and John Brennan, his top counterterrorism adviser, in the Oval Office on Jan. 4, 2010. Brennan is a key voice about who gets put on the "kill list." Pete Souza/White House hide caption

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Doctors: would you respond to an in-flight emergency without your instruments handy? Cimmerian/iStockphoto hide caption

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