Opponents of hydraulic fracturing or "fracking" hold placards during a rally in Lafayette Square, across from the White House, on September 25, 2013 in Washington, DC. The demonstrators say they have collected 250,000 signatures calling on the EPA to re-open investigations into alleged fracking related pollution cases in Pennsylvania, Texas and Wyoming. AFP PHOTO/Mandel NGAN (Photo credit should read MANDEL NGAN/AFP via Getty Images)
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MANDEL NGAN / Staff
September 25, 2013
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