That is not my call to make.

In a life-or-death situation, maybe a Christian could make the decision to take another life, then spend the rest of their life burdened by the guilt and sorrow of breaking the unambiguous 6th Commandment. There is room for repentance in this context.

That is *far* from the reality of the "defense" industry, however. Making widgets so that some dude at a computer terminal has an easier time drone-striking buildings full of kids halfway across the world is, essentially, evil.