Yes. I was remiss in not mentioning remote sensing. We do use remote sensing, and that's also part of the aerial overview surveys. The information I have from our folks who work with this is that it offers a level of indication of forest health—whether there is an issue there or not—but the difficulty is in differentiating the cause.
When you're on the ground, you can examine the material and how the tree is reacting. You can peel back bark or whatever and identify the pest and know what reactions are going on. Remote sensing hasn't gotten down to the finite information to be able to say whether this is a burned tree, or a Douglas fir bark beetle tree, or a spruce beetle tree in year one that will be dead in year two. We haven't gotten down to that granularity.
I believe that people with better minds than mine can use the technologies that we have to get that granularity, but we just haven't had the opportunity to see that and forge ahead with looking into it.