In terms of the cleanup technology, unless we can effectively clean up a spill of persistent oils or crude oils very rapidly, before we lose it and before it begins to do its damage, we have to take the necessary precautions to keep it on the list, because of the potential effect it can have.
We are continuing to do science on what happens to various persistent oils and hydrocarbons when they land in the water. We need to continue to do that science so that we know as much as possible. We are also looking at how we can recover it as effectively as possible, taking into account factors such as how long it takes before you get there, the temperature of the water, the sea state, the salinity, and all those other things. I would say that we are taking a pragmatic approach based on a quantifiable measurement of persistent oils. At this point in time we are being cautious, but we are not excluding all hydrocarbons, as you know.