Yesterday, in a major development, which may have a far reaching consequence, the Oxbow Carbon & Minerals LLC sued two major U.S. freight railroads, Union Pacific Corp. (UNP) and Burlington Northern Santa Fe Corp. (BNSF). Privately heldOxbow, which mines and markets coal and natural gas, filed a lawsuit in the U.S. District Court for the [...] (UNP) U.S. Railroads Facing Lawsuit