TOPSHOT - Students react following a shooting at Marjory Stoneman Douglas High School in Parkland, Florida, a city about 50 miles (80 kilometers) north of Miami on February 14, 2018. A gunman opened fire at the Florida high school, an incident that officials said caused "numerous fatalities" and left terrified students huddled in their classrooms, texting friends and family for help. The Broward County Sheriff's Office said a suspect was in custody. / AFP PHOTO / Michele Eve Sandberg (Photo credit should read MICHELE EVE SANDBERG/AFP/Getty Images)
Video Ad Feedback
911 calls reveal first few minutes of shooting
Anderson Cooper 360
When a shooting erupted at Marjory Stoneman Douglas High School in Parkland, Florida, the first thing some students did was contact their parents. CNN's Alex Marquardt reports on the frantic first few minutes of the Florida school shooting.
02:40 - Source: CNN
Stoneman Douglas High School shooting 16 videos
TOPSHOT - Students react following a shooting at Marjory Stoneman Douglas High School in Parkland, Florida, a city about 50 miles (80 kilometers) north of Miami on February 14, 2018. A gunman opened fire at the Florida high school, an incident that officials said caused "numerous fatalities" and left terrified students huddled in their classrooms, texting friends and family for help. The Broward County Sheriff's Office said a suspect was in custody. / AFP PHOTO / Michele Eve Sandberg (Photo credit should read MICHELE EVE SANDBERG/AFP/Getty Images)
Video Ad Feedback
911 calls reveal first few minutes of shooting
02:40
Now playing
- Source: CNN
TOPSHOT - Marjory Stoneman Douglas High School staff, teachers and students return to school greeted by police and well wishers in Parkland, Florida on February 28, 2018. Students grieving for slain classmates prepared for an emotional return Wednesday to their Florida high school, where a mass shooting shocked the nation and led teen survivors to spur a growing movement to tighten America's gun laws. The community of Parkland, Florida, where residents were plunged into tragedy two weeks ago, steeled itself for the resumption of classes at Marjory Stoneman Douglas High School, where nearby flower-draped memorials and 17 white crosses pay tribute to the 14 students and three staff members who were murdered by a former student. / AFP PHOTO / RHONA WISE (Photo credit should read RHONA WISE/AFP/Getty Images)
Video Ad Feedback
Regresan a clase los estudiantes de Parkland en medio de medidas de seguridad reforzadas
03:32
Now playing
- Source: CNN
Scot Peterson Parkland Officer NBC Interview
Video Ad Feedback
Parkland school officer: Shooting haunts me
01:25
Now playing
- Source: CNN
parkland neighbor Joelle Guarino
Video Ad Feedback
Neighbor: School gunman was pure evil
03:07
Now playing
- Source: CNN
01 nikolas cruz court 0219
Video Ad Feedback
Watch Florida shooter make court appearance
00:41
Now playing
- Source: CNN
florida shooting suspect
Video Ad Feedback
Authorities investigating online postings
01:36
Now playing
- Source: CNN
school shooting tipster's call to FBI 1
Video Ad Feedback
Hear tipster's warning to FBI on shooter
03:31
Now playing
- Source: CNN
This image made available by the Broward County Sheriff's Office on Sunday, Feb. 18, 2018, shows Sheriff Scott Israel, holding the hand of Anthony Borges, 15, a student at Marjory Stoneman Douglas High School. The teenager was shot five times during the massacre on Valentine's Day that killed 17 students. Borges is being credited with saving the lives of at least 20 other students. (Broward County Sheriff's Office via AP)
Video Ad Feedback
Last Parkland shooting patient leaves hospital
00:45
Now playing
- Source: CNN
Broward County Superintendent Robert Runcie updated
Video Ad Feedback
Florida high school to reopen after massacre
01:36
Now playing
- Source: CNN
title: File uploaded by user duration: 00:00:00 site: author: published: intervention: no description:
Video Ad Feedback
Surveillance video shows gunman after shooting
01:37
Now playing
- Source: CNN
florida school shooting inside the school von 2
Video Ad Feedback
Video shows students hiding as shots are fired
00:39
Now playing
- Source: CNN
Kaitlin and Hannah Carbocci 2.16
Video Ad Feedback
Student recounts classmates being shot
02:11
Now playing
- Source: CNN
Nikolas Cruz modeling his body armor.
Video Ad Feedback
Private messages reveal shooter's dark side
01:16
Now playing
- Source: CNN
Additional Embargo: Additional Source(s): Date Shot: 2/15/2018 Shipping/Billing Info: Description: Projects: None Cost Center: Atlanta National Desk / 20100101 Created By: severc On: 1518689865 --------------------------------------------------------------------------------
Video Ad Feedback
Officer describes moment he arrested shooter
01:16
Now playing
- Source: WPBF
09 florida school shooting text messages TEASE
Video Ad Feedback
How the horror unfolded via text, social media
02:33
Now playing
- Source: CNN
florida school shooting mother daughter reunite orig mg_00001827.jpg
Video Ad Feedback
Mom's tearful reunion after shooting
01:02
Now playing
- Source: CNN