A federal appeal court on Friday questioned whether it had the power to override an act of Congress that gave Rio Tinto land in Arizona for its Resolution copper mine.
A group of about 2,000 Polish miners has traveled to Luxembourg to protest against the decision of the European Court of Justice to halt production at their lignite mine.
Millions of workers at repair shops, gas stations, oil fields and farms could find their jobs affected by an economic dislocation of historic proportions.