David Hogg, five years after Parkland

On February 14, 2018, a gunman killed 17 people and injured 17 others at Marjory Stoneman Douglas High School in Parkland, Florida. David Hogg, who was 17 at the time, survived and helped found March for Our Lives, which promotes gun control legislation. Now a senior at Harvard, Hogg tells reporter Rita Braver what he’s been through over the past five years, including death threats against himself and his family; what his group achieved; and what it means for young people to become leaders as advocates for change.