Rep. Thaddeus McCotter, R-Mich., rocks out on Facebook. hide caption

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A programmable LED pumpkin at hacker space HacDC, in Washington, D.C., designed by member David Kaufman. Many Halloween purists prefer to design, rather than buy, high-tech ghouls, goblins and ghosts. Jacob Fenston for NPR hide caption

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Cory Doctorow's With a Little Help will be available online with four different covers, including this one by Frank Wu, and in limited edition hardcover. Enlarge for full cover. Frank Wu hide caption

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Like the look of that celebrity in distress? In-image advertisers hope you will.;; hide caption

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Facebook CEO Mark Zuckerberg at Facebook headquarters in Palo Alto, Calif., on Oct. 5. Facebook said it was working to fix the privacy problem reported by The Wall Street Journal. Paul Sakuma/AP hide caption

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