Nashville mourns and rallies for change after school shooting tragedy.

Cindy Peak, a substitute teacher killed during a shooting at The Covenant School in Nashville, was remembered as a devoted mother, a "spitfire," and a longtime educator who brought out the best in her students. Peak invested her life fully in the encouragement of others, said pastor Scott Sauls during the service. Peak was among six people killed when a former student opened fire at the private Christian school. Her love for her children "launched her into another stratosphere," said her sister Debbie Dunlap.