Right now these are difficult. I will turn it over to Dr. Leuprecht in just a second.
They are difficult, because they are often low-signature and very difficult to attribute. The benefit is that if we see these as part of a suite of different communications systems from seabed to outer space, they are adding redundancy to satellites. We also need to be thinking about redundancy and duplication that is strategic and deliberate when we're deploying these systems. I think the question is very much directed in the right direction. That is, if we're building infrastructure, if we're making these investments, we also need to think about how we're defending this infrastructure and making sure that it's built right into the plans from the onset.