Why Chevron is suing one of D.C.'s most powerful lobbying firms over the Amazon jungle?

It's a monumental battle of wills, money and egos. The oil giant Chevron, the third-biggest U.S. company by revenue, has sued Patton Boggs, the nation's premier legal and lobbying firm, for concealing and promoting fraudulent information in a case that was born in the jungles of the Amazon.