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Our adversaries know that this is a means upon which that they can attempt to have an impact on us and so we've seen the growth in terms of programs across all those major adversaries, we've also seen a rise in capability. And so much in the same way, we've become a much more capable force, so are our adversaries. And so I would tell you whether or not it's China or it's Iran, or it's North Korea, this is why it's so important that we are in a daily competition with what we need to do and I would say the advantages we have are often not talked about.