Kashyia Smith, 12, from Wisconsin, poses in front of the White House as students and gun control advocates gather for the March for Our Lives event on March 24, 2018. #

School children hold placards during a rally to show solidarity with U.S. students in their attempt to end gun violence in America, in Sydney, Australia, on March 24, 2018. #

People take part in a "die in" during a demonstration in favor of tighter gun control in the United States, outside the U.S. Embassy in London, England, on March 24, 2018. #

Protesters carry placards and shout slogans during a demonstration calling for greater gun control, outside the U.S. Embassy in south London on March 24, 2018. The London rally, in solidarity with the U.S. March For Our Lives movement, is one of hundreds of gun control protests taking place globally. #

In Berlin, Germany, demonstrators protest at the March for our Lives demonstration on March 24, 2018. The protest in Berlin was intended to show solidarity with demonstrations across the U.S. demanding stricter gun control legislation in the country. #

In Sao Paulo, Brazil, people take part in the March for Our Lives rally, an organized demonstration to end gun violence in the United States, outside the U.S. Consulate on March 24, 2018. #

In Cincinnati, Ohio, demonstrators gather during the March for Our Lives protest outside City Hall on March 24, 2018. Students and activists in several dozen Ohio communities planned events Saturday in conjunction with a Washington march spearheaded by teens from Marjory Stoneman Douglas High School in Parkland, Florida, where over a dozen people were killed in February. #

Dezmond Floyd, center, joins in the march in downtown Houston, Texas, during the March for Our Lives protest on March 24, 2018. Students and activists across the country planned events Saturday in conjunction with a Washington march spearheaded by teens from Marjory Stoneman Douglas High School in Parkland, Florida, where 17 people were killed in February. #

Delaney Tarr, a survivor of the mass shooting at Marjory Stoneman Douglas High School in Parkland, Florida, speaks during the March for Our Lives rally in Washington on March 24, 2018. #

Naomi Wadler, 11, a student at George Mason Elementary School, who organized a school walkout at her school in Alexandria, Virginia, after the school shooting in Parkland, Florida, speaks during the March for Our Lives rally in Washington on March 24, 2018. #

Edna Chavez, a student at Manual Arts High, south of downtown Los Angeles, blows a kiss as she speaks about the shooting death of her 14-year-old brother during the March for Our Lives rally in Washington on March 24, 2018. #

Trevon "Tre" Bosley, 19, of Chicago, the brother of Terrell Bosley who was killed in 2006 in a case of mistaken identity, speaks during the March for Our Lives rally in Washington on March 24, 2018. #

David Hogg, a survivor of the mass shooting at Marjory Stoneman Douglas High School in Parkland, Florida, raises his fist after speaking during the March for Our Lives rally in Washington on March 24, 2018. #

In Seattle, Washington, Naj Ali, a high school senior, holds a rose in memory of a person lost to gun violence during a rally before a march in favor of gun control on March 24, 2018. #

An overflow crowd gathers in Central Park as people take part in a march and rally against gun violence along nearby Central Park West on March 24, 2018, in New York. #

In Parkland, Florida, Marjory Stoneman Douglas High School students hold their fists up in the air as they participate in the March For Our Lives event at Pine Trails Park before walking to the high school on March 24, 2018. The event was one of many scheduled around the United States calling for gun control after a gunman killed 17 people on February 14 at the high school. #

In Parkland, Florida, People take part in a March For Our Lives rally on March 24, 2018. Thousands of people filled a park near Marjory Stoneman Douglas High School for a rally near the site of last month's school massacre in Parkland. #