More than 3,000 children lost a parent on that awful day. Fifteen years later, in a world rocked by terror, this group has hard-won wisdom to share. Here, in their own words, is a glimpse into their journeys.
Tens of thousands of people die each year from gun violence in the United States. We wanted to know what one day looks like. These aren't the stories that tend to make national headlines. These are the stories that happen every day.