fatal pit bull attack in the US – 460 victims so far to this day June 7, 2015.
https://youtu.be/VRfhmEdLjVQ

I am confused. Pit bull has no locking jaws but you need to carry a break stick all the time. what????
So, to be safe, DON’T FORGET TO CARRY a BREAK STICK WITH YOU ALL THE TIME!.

http://www.pbrc.net/breaksticks.html

Break Stick Information

What Is a Break Stick?
A break stick is a device inserted into the mouth of a pit bull (behind the molars) to facilitate the release of its grip on another dog.

Remember: pit bulls do not have a special mechanism or enzyme that allows them to “lock” their jaw, nor do they possess a higher than average “bite pressure.” They simply have the determination of a terrier.

Not all pit bulls are aggressive toward other dogs. But because the breed has a somewhat higher tendency for dog aggression, break sticks are useful tools to have in a multi-dog household. Please read the following guidelines before attempting to break up a fight using a break stick.

Why Should Responsible Pit Bull Owners Have a Break Stick?
Because canines are pack animals, fights are possible in any multi-dog household, no matter what breed of dog you own. A responsible owner should take measures to prevent such fights, but he or she should also be prepared for the worst. The goal of any owner should be to break up a fight quickly and efficiently. The majority of breeds will snap erratically at their opponent, biting and releasing repeatedly. As terriers, pit bulls will usually bite and hold. Contrary to popular myth, this is not some kind of special pit bull behavior; it is merely terrier behavior. As its name suggests, a break stick is designed to break this determined terrier hold. This is the safest, easiest, and most effective way to stop a fight.

Do not attempt to use a break stick on other dog breeds.

Attempting to use a break stick on other breeds could result in serious injury to the person using the stick. Since other breeds will unpredictably snap and bite instead of getting a grip, you are far more likely to be bitten. You also should not attempt to use a break stick with other terriers. While all terriers grab and hold, pit bulls are far less likely to redirect their bite on an intervening human than, say, a Jack Russell Terrier. For the same reason, you also need to be very careful when separating your pit bull from another breed. Your pit bull will probably not bite you, but you might get bitten by the other dog.