At the ceremony's end, Frank DeAngelis, the school's principal at the time of the shooting, read the 13 names aloud in a wavering voice.
Among those addressing the crowd were survivors of the massacre, former staffers of the school and family members of the 12 students and one teacher who were shot to death by a pair of trench-coat-clad students carrying handguns, shotguns, pipe bombs and extra ammunition.
Addressing hundreds of people gathered at Saturday's service in a park next to the school, Dawn Anna, mother of slain student Lauren Townsend, spoke on behalf of all the families of the victims about their sense of loss.
Pastor James Hoxworth urged anyone who was still struggling because of the shooting to reach out for help.
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But should they fail to make the top four they could still be in the Champions League next season if they win the Europa League . Mustafi has made 109 appearances for Arsenal since joining in 2016 from La Liga outfit Valencia.
Columbine wasn't the last school-related shooting.
"To my Columbine family, all of you, I love you".
Hundreds of residents sat in chairs or on the grass during the two-hour program in which several speakers reflected on how their lives had changed.
Visitors left dozens of single flowers along with cards and seed packets for columbines, the Colorado state flower, on the inner circle of the memorial Saturday. Sheriff's deputies patrolled the area on foot and by bike as little league baseball games went on at nearby fields.
Columbine survivor Patrick Ireland said, "Our innocence was stolen".
They said she had not made specific threats, but dozens of schools, including Columbine, locked their doors.
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Vingt-cinq corps transportés à la morgue de l'institut médico-légale Colombo n'ont par ailleurs pas encore été identifiés. Il a reconnu que les autorités avaient reçu une alerte qui n'a cependant pas été transmise à certains ministres.
Also Saturday, Columbine students, staff and others took part in community service projects, including cleaning up neighborhoods, volunteering at homeless shelters and doing spring cleaning at the homes of senior citizens. "It will never be the way it was before the shooting happened", Columbine High student Rachel Hill said.
The days surrounding the anniversary remain emotionally fraught for survivors of the attack, including those without physical wounds. Some describe their response to the month as an "April fog", dominated by their own memories of the sunny Tuesday in April that shocked the world.
She had made what the Federal Bureau of Investigation characterized as "credible threats", so when she traveled to Colorado on Monday and bought a gun, a search ensued, prompting hundreds of Front Range schools to close.
The body of Sol Pais was found Wednesday morning at the base of Mount Evans in Clear Creek County - but officials believe she died almost two days earlier of suicide, the Denver Post reported.
'We are not a place to come visit if you're not a student, if you don't have business there, ' John McDonald, security chief for the school district, said on Wednesday.
Whether it be shootings incidents at Noblesville and Richmond High Schools or on the streets of Indianapolis, youth gun violence remains a fear for children and teens.
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Tyrion Lannister [Peter Dinklage] and Jorah Mormont [Iain Glen] also were seen briefly with anxious looks on their faces. In the final shot, Brienne asks the soldiers to stand their ground.
Events planned to mark the anniversary of the 1999 Columbine attack will go on as scheduled throughout the week, including a ceremony near the school on Saturday.