Can the United States break its dependence on foreign oil? Although we have been trying since the late-1970s, the percentage of imported crude continues to increase. Even after the shock of $4.00 a gallon gasoline two summers ago, no progress has been made. Now T. Boone Pickens believes Congress is about to pass a bipartisan bill that provides a $65,000 tax credit to switch large commercial trucks from diesel to natural gas.