WASHINGTON - The Senate voted Tuesday to conduct an inventory of offshore oil and gas resources, including in areas that have been off-limits to drilling for nearly a quarter century. Opponents called it a prelude to eventual gas development in areas now under a drilling ban. "This gives Americans full information of what is there," maintained Sen. Mary Landrieu, D-La. "This is not a drilling amendment." But senators from a number of coastal states argued vigorously against the inventory, saying the Interior Department already has a good idea of oil and gas resources beneath the Outer Continental Shelf and doesn't...