Nationwide walkout
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On anniversary of Columbine, students walk out of classes to protest gun violence

Nationwide walkout

From left, Sara Umgerleider, Kayla Kane, Lily Alexander, and Vivian Predock, from Crossroads High School, joined several hundred students from area High Schools and Middle Schools as they coverged on Santa Monica City Hall to mark the 19th anniversary of the Columbine High School massacre.

 (Al Seib / Los Angeles Times)
Nationwide walkout

Several hundred students from area high schools and middle schools coverged on Santa Monica City Hall in protest against all forms of gun violence.

 (Al Seib / Los Angeles Times)
Nationwide walkout

Several hundred students from area high schools and middle schools coverged on Santa Monica City Hall in protest against all forms of gun violence.

 (Al Seib / Los Angeles Times)
Nationwide walkout

Iman Mohammed, 17, left, from Santa Monica College, talks to several hundred students from area schools as they coverged on Santa Monica City Hall in protest against all forms of gun violence.

 (Al Seib / Los Angeles Times)
Nationwide walkout

University High School junior Elias Kanazeh, center, joins students in West LA as they walked out in protest against all forms of gun violence.

 (Al Seib / Los Angeles Times)
Nationwide walkout

Students at University High School in West LA walked out to join several hundred students from area schools in protest against all forms of gun violence.

 (Al Seib / Los Angeles Times)
Nationwide walkout

Several hundred high school students march from the White House to the U.S. Capitol to rally against the National Rifle Assn. and to call for stricter gun laws.

 (Chip Somodevilla / Getty Images)
Nationwide walkout

Student activists participate in a “die-in” to protest gun violence at Washington Square Park, near the campus of New York University.

 (Drew Angerer / Getty Images)
Nationwide walkout

Student activists rally against gun violence at Washington Square Park, near New York University.

 (Drew Angerer / Getty Images)
Nationwide walkout

Students participate in a “die-in” to protest gun violence in New York City.

 (Drew Angerer / Getty Images)
Nationwide walkout

Students rally against gun violence at Washington Square Park in Manhattan.

 (Drew Angerer / Getty Images)
Nationwide walkout

Several hundred high school students march from the White House to the U.S. Capitol in Washington, D.C., in a protest for stricter gun control laws.

 (Chip Somodevilla / Getty Images)
Nationwide walkout

A man shows his support for hundreds of high school students rallying in front of the White House to protest against the National Rifle Assn. and to call for stricter gun laws.

 (Chip Somodevilla / Getty Images)
Nationwide walkout

Students at Clarke Central High School walk out of classes in Athens, Ga., joining thousands across the country protesting school shootings.

 (Joshua L. Jones / Associated Press)
Nationwide walkout

Joana Raja, whose daughter, Lyn Raja, is a Marjory Stoneman Douglas student in Parkland, Fla., signs a banner on National Walkout Day at North Community Park in Coral Springs, Fla.

 (Amy Beth Bennett / Sun Sentinel)
Nationwide walkout

David Hogg, left, joins fellow students from Marjory Stoneman Douglas High School, where 17 classmates and teachers were killed during a mass shooting in February. The students were participating in the second nationwide walkout in as many months.

 (Joe Raedle / Getty Images)
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