Lois Lerner, director of tax-exempt organizations for the IRS, acknowledged Friday that the IRS had targeted some groups for further review because they had those words in their names.

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For now, the European Union, which is set to review its list of targeted sanctions in the next few days, seems to have adopted a wait-and-see attitude.

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Members of the House and Senate intelligence panels will be able to review the classified opinion explaining the administration's legal justification for the targeted killings of U.S. terror suspects abroad.

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Yesterday Lord Prescott told the Today programme that he would seek a judicial review into the affair to "find the truth" about whether he had been targeted by journalists.

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Meanwhile, some Democrats have expressed concern over the government's use of unmanned drones to carry out "targeted killings", and have suggested a vote on Mr Brennan should be delayed until the committee can review certain secret documents relating to the programme.

BBC: Chuck Hagel: US must not dictate to the world