As the situation in Southern California is settling down, it is useful to take the time to understand how the military can be used in a domestic crisis. None of this is easy. Leaders are having to make decisions when none of the options are very good. They are having to choose what I call the “Least-Worst Option” and own it. Striking a balance between not being too impulsive nor being paralyzed is the goal: a timely decision that has a positive outcome. I know the pressure these leaders are under during any crisis. In this case, what adds even more pressure is the use of military assets on America’s streets. The background to making such decisions is not well understood by many. Let me try and briefly explain it so you can tell your friends.