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CHICAGO, IL - APRIL 20: A student holds up her hands while taking part in National School Walkout Day to protest school violence on April 20, 2018 in Chicago, Illinois. Students from around the nation joined in the walkout against gun violence on the 19th anniversary of the shooting at Columbine High School where 13 people were killed. (Photo by Jim Young/Getty Images)
CHICAGO, IL - APRIL 20: A student holds up her hands while taking part in National School Walkout Day to protest school violence on April 20, 2018 in Chicago, Illinois. Students from around the nation joined in the walkout against gun violence on the 19th anniversary of the shooting at Columbine High School where 13 people were killed. (Photo by Jim Young/Getty Images)

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    Students demand action on guns with walkout

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Students demand action on guns with walkout

Thousands of students walked out of their schools to demand action on gun reform as part of the National School Walkout. CNN's Kristen Holmes reports.

Students demand action on guns with walkout

Thousands of students walked out of their schools to demand action on gun reform as part of the National School Walkout. CNN's Kristen Holmes reports.