More than a month after the Gulf Coast oil spill began, BP's next effort to plug the leak is to come at dawn Wednesday. BP plans to pump thick, viscous fluid twice the density of water into the site of the leak to stop the flow so the well can then be sealed with cement - the "top kill" procedure.
Presidential historian Douglas Brinkley and Plaquemines Parish President Billy Nungesser will be digging deeper and discussing the politics and implications of BP's plan. Do you have questions for them? Let us know!
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