These principals have all experienced a school shooting. Now they are helping others navigate the road to recovery when the next one happens

Twenty-three years later, Frank DeAngelis vividly recalls the day his life changed forever. On April 20, 1999, he was the principal at Columbine High School in Littleton, Colorado, when two students -- carrying guns and bombs -- entered the school and opened fire.

source https://www.cnn.com/2022/09/03/us/school-principals-mass-shooting-guide/index.html