Students at Lawrence High School walked out of class and marched to South Park on Friday, April 20, 2018, as part of a protest against gun violence. Friday marked the 19th anniversary of the Columbine High School shooting.

photo by: Ashley Hocking

Students at Lawrence High School walked out of class on Friday, April 20, 2018 as part of a protest against gun violence. Today marks the 19th anniversary of the Columbine High School shooting.

photo by: Ashley Hocking

Lawrence High senior Ashlee Brown participates in the protest against gun violence at Lawrence High School on Friday, April 20, 2018. Today marks the 19th anniversary of the Columbine High School shooting.

photo by: Ashley Hocking

Students at Lawrence High School walked out of class on Friday, April 20, 2018 as part of a protest against gun violence. Today marks the 19th anniversary of the Columbine High School shooting.

photo by: Ashley Hocking

Lawrence High senior Chisato Kimura (left) and sophomore Sami Turner (right) lead a protest against gun violence at Lawrence High School on Friday, April 20, 2018. Today marks the 19th anniversary of the Columbine High School shooting.

photo by: Ashley Hocking

Students at Lawrence High School walked out of class on Friday, April 20, 2018 as part of a protest against gun violence. Today marks the 19th anniversary of the Columbine High School shooting.

photo by: Ashley Hocking

Students at Lawrence High School walked out of class on Friday, April 20, 2018 as part of a protest against gun violence. Today marks the 19th anniversary of the Columbine High School shooting.

photo by: Ashley Hocking

Lawrence High sophomore Sami Turner (left) and senior Chisato Kimura (right) lead a protest against gun violence at Lawrence High School on Friday, April 20, 2018. Today marks the 19th anniversary of the Columbine High School shooting.

photo by: Ashley Hocking

Lawrence High junior Noah Ginsberg says, "Enough is enough" during a protest against gun violence at Lawrence High School on Friday, April 20, 2018. Today marks the 19th anniversary of the Columbine High School shooting.

photo by: Ashley Hocking

Students at Lawrence High School walked out of class on Friday, April 20, 2018 as part of a protest against gun violence. Today marks the 19th anniversary of the Columbine High School shooting.

photo by: Ashley Hocking

Students at Lawrence High School walked out of class and marched to South Park on Friday, April 20, 2018 as part of a protest against gun violence. Today marks the 19th anniversary of the Columbine High School shooting.

photo by: Ashley Hocking

Lawrence High students reach for a orange ribbon as part of a protest against gun violence on Friday, April 20, 2018 at South Park. Orange ribbons are a symbol of tribute to victims of gun violence. Today marks the 19th anniversary of the Columbine High School shooting.

photo by: Ashley Hocking

Lawrence High freshman Lili Christensen reaches for a orange ribbon as part of a protest against gun violence on Friday, April 20, 2018 at South Park. Orange ribbons are a symbol of tribute to victims of gun violence. Today marks the 19th anniversary of the Columbine High School shooting.

photo by: Ashley Hocking

Students walked out of class and marched to South Park on Friday, April 20, 2018 as part of a protest against gun violence. Today marks the 19th anniversary of the Columbine High School shooting.