Transcript for Remembering 9/11: Following the Children Who Lost Parents
So hard to believe it's been 15 years since the attacks on 9/11 and this morning, five teenagers who lost their fathers that day never got to meet them are sharing their story. It's all part of a powerful new documentary and Mara schiavocampo brings us this exclusive first look. My name is shavin Hickory and connected to the events of 9/11 because I was born seven weeks after my father was killed in the south tower. Reporter: They are the other victims of 9/11. I wear number 33 because that's the age that my dad was killed at. When I'm wearing that number it's for him. Reporter: Children whose fathers were killed shortly before their birth. It's little things when I miss my dad the most like walking down the aisle, I think about that a lot. Reporter: Their stories featured in the new people entertainment weekly documentary "The children of 9/11: 15 years later." Oftentimes your first feeling might be, oh, poor kid or what's their life like and it's true, they've had this incredible loss but I found these kids to be incredibly resilient. Reporter: Now teens "People" magazine has been following many of these 9/11 babies since birth. Have you seen this recently? Yes. Which one is you? I'm right there. Robin Higley's dad was an insurance executive in the south tower and helped his co-workers get to safety. Your father helped people live. Yes, he did. He's a hero. He's my hero. I'm a daddy's little girl. Reporter: What does that give you to know your dad is a hero. It gives me comfort. He died protecting others so it gives me a sense of relief because I know his death was not in vain. The world is in really bad shape with all the stuff going on and I feel like my generation is kind of the one that's going to change things. Reporter: While she misses her father deeply, robin like many others struggles with mourning. I wish I could grieve. Ias too young to grieve. I didn't know what was happening. I know I'm older and starting to realize it, I am now going through the grieving process. Reporter: This group one nobody would ever choose to be in now her lifelong source of strength. You get happy when you look at this. I do. Why? Because it just reminds me that they've always been there for me and even though we were so literally. I'm standing right next to my best friends. You guys really support each other. We really do. They're like a family to me. Reporter: For "Good morning America," Mara schiavocampo, ABC news, New York. That is powerful. Really is. Hard to believe grieving for a father you never met. The way she said it so well because they were -- you forget how young some of them were and it does take time. And it makes sense now they're going through the grieving process when they see other families and realize what they've lost. But that how she said together they are a family. It's going to be a very special bond. Only they know what the other has been through. All these stories highlighted in this week's issue of "People" magazine and see the full documentary when it premieres September 13th. Now outside to ginger. Wow, so powerful.
This transcript has been automatically generated and may not be 100% accurate.