Do school shooting drills make students safer?

Candace Taylor (C), a student from West Boca Raton Community High School grieves with schoolmates, at Marjory Stoneman Douglas High School, during a protest to show support, following a mass shooting in Parkland, Florida, U.S., February 20th, 2018. Photo credit: Carlos Garcia Rawlins/Reuters

It’s one year since a gunman killed 17 people and wounded 17 others at Marjory Stoneman Douglas High School in Parkland, Florida. On this anniversary, we look back at the Million Mom March. We also consider whether school shooting drills effectively prepare students for what might happen if a gunman attacks.