A mobile phone shows a Skype application. Josep Lago/AFP/Getty Images hide caption

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Aprovecho executive director Dean Still lights a "rocket stove." Once the fire is going, it takes only two or three sticks at a time to keep a pot of water boiling. Martin Kaste/NPR hide caption

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The home in Tucson, Ariz., where Jared Loughner, charged in a shooting that killed six and wounded more than a dozen, lived with his parents. AFP/AFP/Getty Images hide caption

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Emily Fernandez, holding her daughter Bethany, uses her Nook e-reader to browse some books at a Barnes & Noble in Hackensack, N.J. Privacy advocates are concerned about the data that manufacturers may be able to collect from e-readers. Mark Lennihan/AP hide caption

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A personal iPhone can be set up to receive company e-mail via a Microsoft Exchange Server. But once it is set up, the phone can receive a variety of commands from the server including a remote wipe, which can destroy all the data and disable the phone. Jeff Chiu/AP hide caption

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