No facts, only that it's relatively easy to implement such a system. Add to this the fear that the other party may have implemented a doomsday device, and it be

No facts, only that it's relatively easy to implement such a system. Add to this the fear that the other party may have implemented a doomsday device, and it becomes easy to rationalize the need for such a device. I would even argue the operators in nuclear bunkers are already part of a doomsday device if they have orders to automatically launch an attack if their country has been struck by nuclear weapons.