To clarify one thing, I'm not with the enforcement branch; I'm part of the program that supports enforcement when they are conducting investigations. I can, though, certainly answer the question of what we have implemented since the Volkswagen situation to improve our testing and finding of those defeat devices.
First, we have implemented a risk approach to selecting test specimens to ensure that we have the broadest scope and that we focus on those vehicles or engines that could provide more likelihood of having exceedences.
We've also increased the funding for what we call the enhanced compliance verification approach. In that regard, we are conducting more testing than we were before Volkswagen. Also, we are conducting testing that is different—testing that we do while trying to be unpredictable and find issues such as what we found in the Volkswagen situation.
We're thus no longer only conducting laboratory testing but are also moving ahead to conduct on-road testing using portable emission measurement devices. We're also conducting testing, on an unpredictable cycle, whereby we monitor all of the computer systems and other parameters to try to ensure that the vehicle is always operated in the same way it would be in a laboratory.