If Chris and Maxine McNair have a hard time closing the door on the past, anyone could understand.

On a Sunday morning 36 years ago, their 11-year-old daughter and three other girls, all dressed in white, were in the basement of their church, preparing to lead the service. At 10:22 a.m., a load of dynamite exploded. Thus, September 15, 1963, Youth Day at 16th Street Baptist Church in Birmingham, became the day when four families lost children to hatred.