I agree with Warmbear,running makes you prey. Even turning your back does. I have faced many dogs, large and small including pits and JR's (own a JR). Face the dog. If it is not attacking remain where you are, facing them, stand your ground and watch. As soon as AAA takes a step back Meesha should take confident step forward, the whole time thinking tough brave thoughts. She should only speak if she can do so in a deep confident voice telling AAA "NO!" AAA will most likely take another step back because once the first one is made you have won and the dog is submitting. This may have to be done on more than one occasion but eventually AAA may realize his place and behave for her even if he won't for his owners.
I would like to add that attitude is important. I am a fighter (run too slow to fly) so my general attitude when dealing with unsavory animals or humans is one of I will hurt you if you cross that line. I love animals and enjoy the company of most humans but I am not a pushover or a victim. I had one incident where a pit was coming at me and my first thought was "get closer and I will gladly rip your throat out." Dogs can sense that kind of energy and wisely choose to avoid it.