Yes, that's a great question. There are a lot.
With regard to challenges from deployments, living conditions are always one, but that's not necessarily an industrial challenge.
Our ability to develop and implement weapons that address the threat in a very timely manner is always concerning, not purely from an industrial perspective but also with regard to what happens when we get them into the hands of our soldiers, sailors and aviators, to make sure that they are properly trained and able to conduct planned operations. These things take time, particularly with the level of complexity that we're looking at with some of those weapons. Obviously, the number of resources that we invest into making that transition as easy as possible for the people who are operating with a weapons system is very important.