Obviously after the accidents, it was certainly a huge preoccupation of ours. In doing our original validation through 2016, we did inquire about the MCAS system. We were made aware of its functioning, but unfortunately, at the time we were not provided with a full explanation of its functionality. We did dig into that, but we were satisfied with the answer that we had. I believe it's already on public record that certain aspects of how the MCAS system functioned were not particularly made available by Boeing. I won't get into speculating to what extent the FAA was aware of it, but that's on public record as being an issue.
Certainly, after the accidents, unfortunately, was when we dug in and went back to that question. It was then revealed that the MCAS had additional functionality that required further examination. This is really one of the central issues in the studies that Mr. Robinson mentioned that are going on within the U.S., as the U.S. is the state of design for the aircraft.
We have learned an awful lot since then; there's no question.