The four year-old boy is jumping up and down with joy.

"Daddy! Daddy!"

Dad gets out of the car.

"Daddy's here! Daddy's here!"

The boy is behind a locked screen door. He tries to open it.

"Daddy's here! Mommy, look, daddy's here!"

Dad knows he shouldn't open the door. He waits for his ex-wife to open the door. She won't do it.

"This is my visitation time," dad says, waving a court document.

Mom still won't open the door. The boy is jumping up and down, saying "daddy, daddy" and tries to open the screen door.

Dad walks back to his car. The boy doesn't understand. He disappears inside the house.

The police arrive. Dad called them. He shows the officers his court documents. The officers go inside to investigate. They come out a few minutes later. The officer tells dad "your son says he doesn't want to see you. There's nothing I can do. You'll have to deal with it in the court. I can't make him go with you if he doesn't want to."

In ways large and small, millions of American children have been taught to hate their noncustodial parents. They, and the targeted parents, are victims of Parental Alienation Syndrome.

Jayne A. Major, Ph.D., of Breakthrough Parenting works with parents whose children are the victims of their ex-spouses' campaigns. Family law attorney Jeff Leving, author of Fathers' Rights: Hard-Hitting and Fair Advice for Every Father Involved in a Custody Dispute, has helped parents who are targets of parental alienation fight for their rights.