I'll just say as an observer that I was very gratified to hear the interest in the F-35. The fifth-generation aircraft is going to be pretty useful when you're contending with fifth-generation threats like from Russia, for instance.
There are a couple of things that come to mind there. One is, of course, the sustainability and the co-operation in runways and the operations and sustainment to be working together, and it's supposed to have a multiplicity of aircraft. Another thing includes just the sensing. It's not necessarily the best way. We've heard a lot about the need for broad sensing, over-the-horizon radars, ground-based radars, looking out the window of an aircraft or having the sensors of an aircraft look for cruise missiles. Those are a useful supplement to all that, whether it is in terms of engaging incoming aircraft or, perhaps, again, looking for cruise missiles coming in or UAVs.
I think the sensor package on the F-35 is what jumps out to me as much as anything.