dilleringer, i'm going to -- dillinger, i'm going to leave the last question to you. as painful as all this is, to me we can get through it and i think you're referencing your work on the columbia. that was also a very painful moment for nasa, a very painful moment for this committee. i sat on the oversight investigation of that, that the committee did, in joint session with other senate committees. so -- but we did get through that. what do you think are the lessons learned here? how can you -- how can we successfully move past this and on to the success that we want to see in aviation? because i think the foundation is very strong. we have a great hundred years of aviation success. we want to build on it. we want to be known for the successes that the united states has had in aviation. i think the elements are there. but what is it that we need to do to learn from what columbia learned on how to move forward? ms. dillinger: thank you, senator. that has been my life for decades. i think what we learned from columbia that's applicable here and was applicable to the re