Members of Columbine High School's Class of 1999 got together to help other shooting survivors. Then they realized they still needed help themselves.
15 years after surviving the 1999 mass shooting at Columbine High School, Sam Granillo prepares to visit the room where he was hiding that day.
Sam Granillo meets Joe Dubowski, whose daughter Gayle was one of the five students killed during a 2008 shooting at Northern Illinois University.
Lester Holt joins Sam Granillo on his visit to Red Lake, Minnesota to meet a fellow school shooting survivor.
Columbine survivor Sam Granillo has an emotional reunion with his friend and Virginia Tech survivor Kristina Anderson.
Columbine survivor Samuel Granillo embarks on a journey he hopes will help him find a more positive way to confront the tragedy that has shaped his life.