People arrive for the March For Our Lives rally against gun violence in Washington, DC, US on Saturday. /VCG Photo

Galvanized by a massacre at a Florida high school, hundreds of thousands of Americans took to the streets in cities across the United States on Saturday in the biggest protest for gun control in a generation. /VCG Photo

Oranizers of the march said they hoped to draw 500,000 protesters, making it one of the largest Washington protests since the Vietnam War. /VCG Photo