Thousands of protesters in Parkland, Florida, chanted in support of stronger gun laws as they neared Marjory Stoneman Douglas High School, where 17 students and staff were slain Feb. 14.
But as they passed the school Saturday they went silent to honor those who died there.
More than 20,000 people attended a rally and march in the Fort Lauderdale suburb, part of the March for Our Lives movement that held rallies in Washington, D.C., and cities around the country on Saturday.
Some speakers called for bans on the AR-15 semi-automatic rifle that suspect Nikolas Cruz used in the massacre.
Others called for more funding to install bulletproof doors and windows in classrooms. Some of those killed and wounded were shot through doors.