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Associated Press
FILE - In this May 10, 2012 file photo, Maricopa County Sheriff Joe Arpaio pounds his fist on the podium during a news conference in Phoenix as he answers questions regarding the Department of Justice's federal civil lawsuit against him and his department. Arpaio, known nationally for his hardline stance on illegal immigration, is expected to take the witness stand Tuesday, July 24, 2012 and face allegations that his trademark immigration sweeps amounted to racial profiling against Hispanics. (AP Photo/Ross D. Franklin, File)

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