Trevon Bosley, a Chicago teenager who lost his brother to gun violence, led the crowd in a chant: “Everyday shootings are everyday problems.”

“I’m here to speak for those youth who fear they may be shot while going to the gas station, the movies, the bus stop, to church or even to and from school,” Bosley said. “I’m here to speak for those Chicago youth who feel their voices have been silenced for far too long. And I’m here to speak on behalf of everyone who believes a child getting shot and killed in Chicago or any other city is still a not-acceptable norm.”

Bosley cited grim statistics from Chicago: Since 2006, more than 5,850 people have been fatally shot in the city, he said. Since 2012, more than 16,000 people have been shot there.