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A student who survived the deadly shooting at a Florida high school tearfully shared her harrowing story on "The Story" on Thursday.

Haley Betancourt, a freshman at Marjory Stoneman Douglas High School, said she was in her creative writing class Wednesday afternoon when they heard strange sounds and then the fire alarm.

When they realized the sounds were gunshots, she said her teacher immediately told the students in the crowded hallway to come into the classroom and then barricaded the door.

"I just want to say thank you to [her] because she saved my life," Betancourt said. "If it wasn't for that, we could have all been dead."

She said it was horrible as they waited in the classroom, because they could hear the screams and gunshots.

"There was this kid. You could hear him all throughout the hallways. He was saying, 'Please, please help me. Please let me in.' And it was the most heartbreaking thing, because you couldn't let him in. You couldn't help him," Betancourt said. "Unfortunately, he passed away."

Betancourt, who lost eight friends in the shooting, said she is taking some solace in the fact that the victims of the tragedy are "in a much better place now." 

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