Lives needlessly lost.

And it's been happening for a while.

Biden’s “Dreamers” Party, Prioritizing Illegals Over Struggling Americans?

It's been nearly 12 years since a young man walked into Sandy Hook Elementary School in Newtown, Connecticut, with an AR-15. rifle and two handguns and opened fire, killing 20 first graders and six faculty members before turning the gun on himself. Survivors of the Sandy Hook shooting—kids who watched their friends and teachers being murdered in their classrooms—are now graduating from high school, and they have complicated feelings about the milestone and the 20 classmates who aren't joining them. A private graduation ceremony was held at Newtown High School on June 12, 2024, with 335 graduates including around 60 Sandy Hook survivors. Some of them shared their thoughts with journalists in the days leading up to graduation.“I think we’re all super excited for the day,” Lilly Wasilnak, 17, shared with the AP. "But I think we can’t forget ... that there is a whole chunk of our class missing. And so going into graduation, we all have very mixed emotions — trying to be excited for ourselves and this accomplishment that we’ve worked so hard for, but also those who aren’t able to share it with us, who should have been able to.”"The shooter actually came into my classroom," Emma Ehrens, 17, told CBS News. "So I had to, like, watch all my friends and teachers get killed, and I had to run for my life at six years old."According to the AP, Ehrens was one of 11 kids who survived from Classroom 10. She was able to escape with a group of students when the shooter paused to reload his gun. Five students and both teachers in the room were killed.“I am definitely going be feeling a lot of mixed emotions,” Ehrens said. “I’m super excited to be, like, done with high school and moving on to the next chapter of my life. But I’m also so ... mournful, I guess, to have to be walking across that stage alone. … I like to think that they’ll be there with us and walking across that stage with us.”The survivors who are graduating this year are dealing with both the exciting what ifs of their futures and the tragic what ifs of their past as they remember their slain classmates."Just growing up with having the fear, and the what ifs of what could have happened if I stayed? Because I was, like, I was going to be next," Ehrens told CBS News."So even going to prom, you think, well, what if they were my prom date? Or, you know, what if they were my significant other? What if they were able to walk the stage with me," survivor Ella Seaver added.“As much as we’ve tried to have that normal, like, childhood and normal high school experience, it wasn’t totally normal,” Grace Fischer, 18, told CBS. “But even though we are missing ... such a big chunk of our class, like Lilly said, we are still graduating. ... We want to be those regular teenagers who walk across the stage that day and feel that, like, celebratory feeling in ourselves, knowing that we’ve come this far.”That desire for normalcy conflicting with their not normal childhood is part of what makes graduation such a bittersweet experience for these young people. They had so much taken from them at such a young age, and that trauma doesn't just disappear. Some of the students expressed that they are looking forward to moving away from Newtown and building a life in which the school shooting doesn't define them.Sandy Hook was unique in that the victims were so young and there were so many of them, but the survivors aren't alone in their experience. In the years since the Sandy Hook massacre, the U.S. has seen dozens more school shootings, and there are thousands of school shooting survivors dealing with related traumas. Many of those survivors have become outspoken anti-gun-violence advocates, pressuring officials to enact stronger laws to keep guns out of the wrong hands. But for now, the Sandy Hook graduates are celebrating a big life milestone, just as they—and their 20 missing classmates—should be. Watch six of the Sandy Hook survivors share their stories on Good Morning America: