In a historic day of action, more than 800 protests on Saturday urged lawmakers to pass gun control. In Washington, D.C., alone, organizers say up to 800,000 people took part in the March for Our Lives, which was organized by students who survived the Feb. 14 shooting massacre at the Marjory Stoneman Douglas High School in Parkland, Florida. In New York, another 150,000 people took to the streets; 85,000 rallied in Chicago; 55,000 marched in Los Angeles. Tens of thousands also rallied in Atlanta and Pittsburgh. And 20,000 people gathered in Parkland, Florida.