and if there's someone i need to talk to about this problem it's dianne ladker. a woman doing everything she can to put names to these horrific numbers. >> we're in the memorial tribute to young people killed by violence in chicago, illinois. >> there's a huge number of stones and i think in my brain i was trying to make this be over the last 30 or 40 years but this is just since -- >> may of 2007. >> wow. >> it started off with this young man who was killed in may of 2007 on a bus coming home from school. >> so what made you decide to build this memorial? >> when blair was killed i knew his father and i got angry because everybody wanted to march and rally. it wasn't working and home depo i saw these stones and i wanted to shock my community. i waned to let them know we were losing all these young people to violence and the families come here because they apreciate keeping the memory of their kids alive. >> every memory is a story. >> that's the reason why we do it. >> there was a one-year-old getting the diner change and they're shooting her father. are you kid