The timelines that we're working toward or that we're anchored around are based on the life of the CP-140 Aurora as it is right now. The reality is that there isn't a specific date on a calendar in the future when the CP-140 will suddenly no longer be able to fly or operate. What we see is a degradation in capability over time and an increase in the threat environment over time.
We're working toward a milestone that isn't terribly precise, despite the fact that there's an exact date put on it. The milestones are set to guide us in our work, and then we adjust based on what we think we can actually achieve.