Exxon, U.S. Government duel over oil discovery

Exxon Mobil Corp. is fighting with the U.S. government to keep control of one of its biggest oil discoveries. The massive Gulf of Mexico discovery contains an estimated one billion barrels of recoverable oil. The problem lies in the fact that the Interior Department says Exxon's leases expired and the company hasn't met the requirements for an extension. Exxon sued to retain the leases. Full article.