disaster? >> we have implemented major, major change following the dins ends in 2006 and 2007. we implemented changes to our people in terms of the skills and capabilities that we have, we have implemented changes to the training they get and the expertise they develop and we have implemented significant changes to all of the operation practices including the implementation of an operating management system that covers all of the company's operations. it's been a root and branch review from top to bottom. >> i guess my concern is having followed both the alaskan pipeline and the texas city refinery disaster, those reforms haven't worked. what will be done differently this time in the last almost 60 days has there been some discussion on why the reforms from the texas city and the alaska pipeline hasn't worked?