>> but -- but you and i have spoken on the phone, professor, and i know -- >> yes. >> -- you're concerned about the whole structural quality of this rig that is out there right now. tell me what your worst-case fears are? >> well, let me explain for your listeners that a well is actually sort of a very fragile system in which the pipe goes through the rock and quite complex. and my concern, my fear, is that the integrity of that well has, in fact, been compromised by the blowout and by other activities. my worst fear is that the oil will find its way through the rock to the seabed rather than through the well and we'll go from an engineering problem to a natural problem. we here living in santa barbara have an example. there are natural seeps, 100 barrels of oil a day, they've been doing it for half a million years. this could go from something we can resolve to a permanent