Two parents whose children were killed in the mass shooting at Marjory Stoneman Douglas High School announced Tuesday they are running for the Broward County School Board. Lori Alhadeff and Ryan Petty said they will enact change so troubled students like the school gunman won't "fall through the cracks." Alhadeff's daughter, Alyssa, and Petty's daughter, Alaina, were among the 17 people murdered in the February 14 shooting.