Barbara Ann Cross also testified for the prosecution. She is the daughter of the Reverend John Cross and was aged 13 in 1963. Cross had attended the same Sunday School class as the four victims on the day of the bombing and was slightly wounded in the attack. On May 15, Cross testified that prior to the explosion, she and the four girls killed had each attended a Youth Day Sunday School lesson in which the theme taught was how to react to a physical injustice. Cross testified that each girl present had been taught to contemplate how Jesus would react to affliction or injustice, and they were asked to learn to consider, "What Would Jesus Do?" Cross testified that she would usually have accompanied her friends into the basement lounge to change into robes for the forthcoming sermon, but she had been given an assignment. Shortly thereafter, she had heard "the most horrible noise", before being struck on the head by debris.