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Through mr. dingle's questions. then we'll recess. >> thank you, mr. chairman. mr. hayward, you had two choices using single casing or tie-back. the risks are substantial associated with single casing, which is what bp chose. please answer yes or no. can you assure us that under oath that was not a decision made to save time and money? >> i wasn't part of that decision making process. >> i'm sorry? >> i was not part of that decision making process. so i can't possibly know the basis on which that decision was taken. >> how much money was saved by using the single string casing? >> i believe th...

>> let me try this. in the time i have left, this has been asked several times and i don't think we've gotten an answer yet. we know about the emails from bp employees expressing concerns about the casing procedures, including an april 15th email from your drilling engineer, brian morel, who described the well as a nightmare well. how much were the drilling engineers consulted in the decision to use the single string casing? was this a bottomup decision in which the people connected to drilling the operation had influence, or did it come from the top down. >> the -- as i understand it, from th...

>> this has been asked several times and i don't think we have gotten an answer yet, we all know about the e-mails from bp employees talking about the safety are pro-seed yours. brian morrell described the well as, quote, a nightmare well. how much were the drilling engineers consulted in the decision to use the single string casing? was this a bottom up decision in which the people actually connected to drilling the operation had some influence? or did it come from the top down? >> as i understand it, from the discussion with our investigation team and from the review of the documents, there ...