Seth Harrison/The Journal News/USA Today
  • New York City

    New York City
    On April 20, 2018 students across the country walked out of class to rally against school gun violence -- an event the teenage organizers hope will empower young people to continue their momentum in a push for common-sense gun reform. The National School Walkout coincides with the anniversary of the massacre at Columbine High School in Colorado, where two students opened fire in 1999, killing 12 classmates and one teacher. <br> <br> Student activists rally against gun violence at Washington Square Park, near the campus of New York University, April 20, 2018, in New York City.
    Drew Angerer/Getty Images
  • Great Barrington, Mass.

    Great Barrington, Mass.
    Maura Palden from Bard College protests along Main Street in Great Barrington, Mass., April 20, 2018, as they take part in a National School Walkout event to protest gun violence. </br></br>Protests were held across the country, April 20, 2018, on the 19th anniversary of the Columbine High School shooting.
    Ben Garver/The Berkshire Eagle/AP
  • Oak Park, Illinois

    Oak Park, Illinois
    Students march in protest at Oak Park and River Forest High School, April 20, 2018, in Oak Park, Ill., as they taking part in the National School Walkout to protest gun violence.
    Jose M. Osorio/Chicago Tribune/AP
  • Bronxville, New York

    Bronxville, New York
    A student holds a sign as Bronxville High School students partake in the National School Walkout in Bronxville, N.Y., April 20, 2018. </br></br>Students listened to speakers during the rally to protest gun violence and to commemorate the 19th anniversary of the shootings at Columbine High School in 1999.
    Seth Harrison/The Journal News/USA Today
  • Washington, D.C.

    Washington, D.C.
    Students protest on the West Lawn of the US Capitol after rallying with several hundred fellow students to call for stricter gun laws in Washington, DC, April 20, 2018, to protest gun violence as part of the National School Walkout. </br></br>Students across the country were urged to walk out of classes to mark the 19th anniversary of the 1999 school shooting at Columbine High School in Colorado which left 13 people dead.
    Andrew Caballero/AFP/Getty Images
  • Parkland, Fla.

    Parkland, Fla.
    Students from Marjory Stoneman Douglas High School, where 17 classmates and teachers were killed during a mass shooting, leave school together for the National School Walkout, April 20, 2018, in Parkland, Fla.
    Joe Raedle/Getty Images
  • New York City

    New York City
    Student activists participate in protest to gun violence at Washington Square Park, near the campus of New York University, April 20, 2018, in New York City.
    Drew Angerer/Getty Images
  • Grand Blanc, Michigan

    Grand Blanc, Michigan
    Grand Blanc freshmen, left, Octavia Williams, Yolanda Cohen, Teylyn Neal and Azariyah Wood stand listen to fellow students speak out against gun violence, April 20, 2018, in Grand Blanc, Mich., as they took part in the National School Walkout event to protest gun violence.
    Jake May/The Flint Journal-MLive.com via AP
  • New York City

    New York City
    Student activists rally against gun violence at Washington Square Park, near the campus of New York University, April 20, 2018, in New York City.
    Drew Angerer/Getty Images
  • Washington, D.C.

    Washington, D.C.
    A man shows his support for several hundred high school students from the Washington area as they rallying in front of the White House to protest against the National Rifle Association and to call for stricter gun laws, April 20, 2018, in Washington, D.C.
    Chip Somodevilla/Getty Images
  • New York City

    New York City
    Youths take part in a National School Walkout anti-gun march in Washington Square Park in New York, April 20, 2018.
    Brendan McDermid/Reuters
  • Manchester, New Hampshire

    Manchester, New Hampshire
    Two rings of chairs encircle the words "NEVER AGAIN" in a silent protest on the 19th anniversary of the Columbine High School shooting outside Trinity High School in Manchester, N.H., April 20, 2018.
    Charles Krupa/AP