Kenya (where this video was reportedly filmed) has a scarce supply of security and police dogs, but this video shines a light onto just how disciplined the existing ones are—and the training process that gets them to this point. The main premise is control and for the dog to learn what to look for. In other words, to distinguish harmless from harmful behaviors.
As you can see, this tough dog goes from friendly to fierce in a split second when the “attacker” pulls out a knife, but she is never out of control, paying close attention to her handler’s commands. That makes her an ideal protector and a dog who is not to be messed with.