we want redundancy in the production capability and also in the capacity so that while we re doing this, we can still deal with the entire flow. for that reason, it was anticipated whether or not the capping stack works and we shut the well in that we would ultimately go to four sources of production under the new system, the kill and choke lines from the original blowout preventer and the kill and choke lines from the new capping stack. two would go to vertical riser pipes anchored on the sea floor, and the other two would go to drill strings that are put below production vessels and kengted by a small coupe pling that can be disconnected quickly in times of a hurricane. the combination of those four platforms will give us 60,000 to 80,000 barrels a day and capacity redundancy of a margin if one of the four went down, the other three could still maintain the flow from the pipes. next question.