For those who question the post–Soviet Union value of NATO, it was telling that an alliance designed originally for the defense of Western Europe fought its first combat campaign in response to the 9/11 attacks on America. It must not be forgotten, in our too often transactional view of allies, that these nations offered up the blood of their sons and daughters in our common defense. As Churchill said, “There is only one thing worse than fighting with allies, and that is fighting without them!”