HOUSTON, Aug. 17, 2011 /PRNewswire/ -- BHP Billiton
and Petrohawk Energy Corporation ('Petrohawk')
announced today that on 17 August 2011, BHP Billiton and Petrohawk received notice from the Committee on Foreign Investment in the U.S. ('CFIUS') that CFIUS has concluded that there are no national security issues of concern in relation to the
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