all the details. this is a very significant test in the evolution of this response and our ability to increase our containment, our redundancy and capacity. i l ll talk about that in a lite bit. we consulted extensively with outside experts. our science team led by secretary of energy chu consulted also with other members of industry regarding potential issues we should deal with. i will zero right in on what the discussion was mainly about and be happy to answer some questions about it. we have never been sure that we have known the condition of the well bore and the casing pipe since the event occurred. as we ve gotten closer to having the potential to close in and do pressure readings on the capping stack, we have had numerous discussions about what the current status is of the well bore and the casings and the implications if they had been damaged or if there was any communication outside the well