The engineering design of it, to last 50 years, is a challenge in itself. We're not very good at designing too many things that last longer than that. What they do include now are very sophisticated monitoring systems around these facilities. They're compelled by law to track and monitor the environment around them, so if there happens to be a breach, something starts to move, you're looking for an early warning there. That has really, really helped. People have been able to make predictions and change things if there's been a leak. So make sure they keep an eye on the monitoring system. The problem could be a compound coming out of that contaminated soil that we don't even know about yet. That's the emerging contaminant challenge that we have. Several have asked about that. That gives us at least some safeguard to something failing.
