Do the spouses and families of Seal team members live in daily fear that their loved ones will suddenly kill them in a moment uncontrolled anger? No! They do not. Why not? How are professional soldiers able to function as ordinary citizens? How do you train for a real fight or a fight to the death in a way that will also permit you to be a loving spouse and parent and a productive citizen until the need arises? It is accomplished by using the concept of binary training. The binary concept relates to two separate, relatively harmless entities that, when combined, create a third deadly entity.
Many military chemical weapons are binary. Each part of the two parts of the weapon is harmless, but, when the two parts combined, they form a deadly mixture. The atomic bomb is binary. A critical mass is halved and the halves are kept separate. Other than their limited-range radiation, they are harmless. However, when forced together by a powerful conventional explosion, they create one of the most destructive forces known to man.
A killer requires two things, the will to kill, and the ability to kill. Separately, neither will nor ability is illegal. It is not illegal to walk down the street carrying a shotgun. It is not illegal merely to want to kill someone. However, it is illegal to walk down the street with a shotgun with the will and intent to kill someone.