"The agency is cooperating fully with the authorities, and will review the situation and take any appropriate action, " its written statement read.

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But the U.S. and others say the agency should punish Iran for not cooperating with inspections on possible weapons programs.

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In the United States, that cooperating organization is the Peace Corps, a government agency with a sharp Web site.

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Rogers told NBC the agency "did their due diligence" but Russian authorities "stopped cooperating" when the United States sought further clarification.

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"Wal-Mart is cooperating with the government during this process, " the spokeswoman said on the probe by the agency.

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In one of the charging complaints unsealed Tuesday, Mr. O'Cearrbhail, who went by the Internet nickname "anonsacco, " asked a cooperating witness for help listening in on a conference call between a U.K. law-enforcement agency and the FBI.

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