union carbide damaged to be sure but kept on going. but it does create some vulnerabilities in a lot of different ways not the least being your own position in the industry and whether you might become a takeover candidate yourself. >> lehrer: do you agree with that, robin west? within the industry there's a problem here too. >> i think so. i think that this has hurt the industry somewhat. i agree with professor finkelstein. one of the real risks is what we call license to operate which is the confidence of the public which permits you to go about your business. bp and all these oil companies, they operate all over the world. it's not just the u.s. government. it's governments everywhere. they have to have their confidence. without that, they can't function. >> lehrer: what about the exxon and the exxon valdez oil spill. we all know about that but exxon is still in business now many years later. what is the difference? or how did they handle it and how were they able to survive it? >> exxon, the first thing, it was a terrible disaster