@CNN: When a shooting erupted at a high school in Parkland, Florida, the first thing some students did was contact their parents.

Those parents’ voices could be heard on the line in 911 calls released by the Broward County Sheriff’s Office. https://t.co/XafeMnZFpv

When a shooting erupted at a high school in Parkland, Florida, the first thing some students did was contact their parents.

Those parents' voices could be heard on the line in 911 calls released by the Broward County Sheriff's Office. https://t.co/XafeMnZFpv

— CNN (@CNN) March 9, 2018