Parkland students speak out about their new book

Emma Gonzalez, Matt Deitsch and Delaney Tarr appear live on "GMA" to discuss their new book and their movement to encourage young people to vote.
4:20 | 10/15/18

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Transcript for Parkland students speak out about their new book
Now to the young activist who sparked a gun safety movement after the mass shooting at Marjory stone Douglas high school, helping lead the March against gun violence in Washington, and now out with a new book called "Glimmer of hope." Welcome to all of you. Thanks for coming in. You worked on this book with many of your classmates from Marjory stone Douglas. Of those moments where everything changes in an instant. So just, how are you doing now? I don't know. It goes on a day-to-day basis. I don't really have a general sense of how I am. Also the work we do is rather hectic on a day-to-day basis. We all have to be in our own moments every time something comes up. Has that helped pouring immediately all of that energy into the movement? I think it did. For me, it definitely personally did. You write about the funerals you had to go to in the days after the shooting, are just etched in your mind. Yes. I mean, it's impossible to see someone younger than you that you know, in an open casket. You actually left the high school. I had gone to high school in 2016. I graduated and my brother and sister were still students during the shooting, and I had been to several of the funerals, and I felt helpless in the immediate aftermath when we didn't know how many people had died or what was -- what had actually happened, and it wasn't until I went to Joaquin Oliver's funeral, and I knew I had to keep fighting for him and my family and for my community and people all around the country that deal with this trauma every single day. And you guys have been out there every single day. Delaney, we all remember that March on Washington. When you look back at that, and you look at the people you met, what moment stands out to you? I mean, it's kind of hard to really just pick one moment from a day like that because it was so life-changing and incredible, but for me the best moments were the ones where I really just got to feel the unity that was there, feel all of this connection and all of this power of young people together. It wasn't meeting the celebrities. It wasn't giving my speech. I blacked out during all of that. I don't remember any of it. Blacked out? It's just gone. It's a blank in my memory. The moments where we were looking over the crowd and saw all of these young people together just -- for something that they cared about, that is what motivated us, and that was what I really took away from that. And to know it was happening not just there, but in schools all across the country. My girls went out and marched that day. We were watching them in Australia the night before. We were, like, it started without us? It was a whole thing. Over 800 marches without the world. And it has not stopped yet, but, you know, along with the power of that movement, and you have also had to learn how to deal with the criticism that comes with being in the public eye. Has that been difficult? No one who has experienced this should be in the public eye. It's incredibly traumatizing, generally speaking. What do you say to your critics? I mean, there are so many different things to say. It's not very much a retaliation as it is a conversation. We have this way of learning from people that criticize us, the way of taking away their perspectives and really just broadening our message and broadening our goals, but most of the time this criticism comes from perception and miscommunication and not realizing what we stand for, noted realizing we're not trying to take away the second amendment. We're trying to create legislation that makes it safer for citizens in our country to live, day by day, for people to go to church and all of those things. It is very much people don't necessarily know what it is that we stand for, and when we have those conversations and we get to actually communicate with them face-to-face, we end up reaching common ground. Part of that conversation is getting people to vote. Of course. I mean, if young people show up at this election in 2018, and any election in the future, young people determine the winner every single time. We are the largest voting block in this country and we show up about 1 in 5 normally. The polls are in our direction. The feelings and emotions are in our direction. We are hyping up this generation to actually make history on November 6th. You will be working for the next three weeks. Thank you for coming in today. Thank you. The book is out tomorrow, and the authors are donating all of their proceeds to the March for

This transcript has been automatically generated and may not be 100% accurate.

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