School lockdown drills have become common — experts say they could be better
Before the Columbine High School shooting, schools prepared for fires and natural disasters. After the 1999 massacre, states enacted lockdown and active shooter drills.
Watch CBS News
Before the Columbine High School shooting, schools prepared for fires and natural disasters. After the 1999 massacre, states enacted lockdown and active shooter drills.
People released doves, lit candles, recited prayers and shed tears Tuesday as the Parkland community commemorated the fifth anniversary of the murder of 14 students and three staff members at Marjory Stoneman Douglas High School and showed support for their families.
The gunman killed 14 students and three staff members at Marjory Stoneman Douglas High School in 2018.
