Anguished parents are grieving for the Nashville school shooting victims. Under the banner #thisisnineyearsold, they are posting images of their own 9-year-old kids as a way to mourn the slain students, who were all 9 years of age. Hallie Scruggs, Evelyn Dieckhaus and William Kinney were killed during the shooting. Staff members Katherine Koonce, Cynthia Peak and Mike Hill were also killed during the massacre.