billions the railroads have spent billions it is it just hasn't come together in the time frame that congress has wanted. >> paul do you have any doubt, you've been involved in a lot of these investigations that in the end, we will know precisely why this occurred we'll be able to draw important lessons from it even if the engineer we don't know if the engineer is going to cooperate or not, let's say the engineer decides to lawyer up and not cooperate, will the public still have full knowledge of what happened? >> well, as peter said we do not have any microphone in the cab of the train, unfortunately. i've worked on cases where i had to enhance recordings made from the external microphone to try to pick up what happened in the cab. it's very difficult because the outdoor notices is horrendous at that speed. will we ever know? we will know exactly how the controls were set and at what point. we'll know the exact speed to