[dreamcompiler]

The US military does not design US nuclear weapons or their safety systems. Of course military requirements are factored in, but design responsibilities and final authority for use are in civilian hands, by law. That's why the Department of Energy is a separate entity from the Department of Defense.

Obviously the military could make mistakes when the weapons are in their custody, but civilian designs make sure those mistakes don't cause an unplanned detonation. Nor can a rogue military unit arbitrarily decide to start WW III. If they tried, the weapons would turn into bricks.