Melissa Joan Hart, best known for her role in "Sabrina The Teenage Witch," recounts her experience helping children escape from the deadly shooting at Covenant School in Nashville, Tennessee. Hart and her husband Mark Wilkerson jumped into action, helping a class of kindergartners across a busy highway and reuniting a mother with her children. Hart said the experience was especially difficult for her, as she and her family had previously lived in Connecticut, where the 2012 mass shooting at Sandy Hook Elementary School left 20 children dead.
