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'Our innocence has been taken from us,' school shooting survivor says 1:48

'Our innocence has been taken from us,' school shooting survivor says

Do you know what to do in an active shooter situation? This Florida sheriff's office can show you. 6:14

Do you know what to do in an active shooter situation? This Florida sheriff's office can show you.

School shooters: Know the warning signs 2:30

School shooters: Know the warning signs

Trump to American children after Florida school shooting: You are never alone 1:01

Trump to American children after Florida school shooting: You are never alone

AR-15: The Gun Behind So Many Mass Shootings 2:05

AR-15: The Gun Behind So Many Mass Shootings

Students and staff tell what happened inside Douglas high school 1:53

Students and staff tell what happened inside Douglas high school

Police respond to school shooting at Florida high school 1:50

Police respond to school shooting at Florida high school

Sweet, shivering puppy comforted by police officer after being rescued from river 1:04

Sweet, shivering puppy comforted by police officer after being rescued from river

U.F.O.s: What does the government know? 2:09

U.F.O.s: What does the government know?

Coast Guard cutter breaking through ice near Antartica 0:59

Coast Guard cutter breaking through ice near Antartica

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Esther Medina Miami Herald/McClatchy