When Dr. David Schonfeld's daughter came home and told the story of a lockdown drill at school, she talked about making jokes with other students while her class hid in a closet for 30 minutes.
원문출처 : https://www.cnn.com/2022/05/27/health/lockdown-drill-impact-kids-parenting-wellness/index.html
원문출처 : https://www.cnn.com/2022/05/27/health/lockdown-drill-impact-kids-parenting-wellness/index.html