Managing Bad Customer Relations

There is a common saying that the customer is always right. Clearly, this can create many issues with customer relationship management as many times the customer is actually incorrect, but you can't tell the customer they are wrong. Research the Internet to find an example of a customer relationship gone wrong and determine if the customer was at fault for the problem. What can you do as a manager when a customer is angry but clearly wrong about a situation? What strategies can a manager use when dealing with angry customers?