(May 25, 2018, 11:31 AM EDT) -- Washington, D.C. — Energy firms on May 22 moved a District of Columbia federal court for an order allowing them to begin attachment and enforcement efforts in an attempt to satisfy payment of a $11.75 million award issued by the Permanent Court of Arbitration (PCA) against Ghana (Balkan Energy Limited, et al. v. Ghana, No. 1:17-cv-00584, D. D.C.)....