Pamela Green-Jackson began crusade for youth fitness after her obese brother died . Youth Becoming Healthy teaches middle schoolers about exercise and nutrition . The organization has helped about 4,000 children since 2004 . Do you know a hero ? Nominations are open until August 20.
Pamela Green-Jackson began crusade for youth fitness after her obese brother died . Youth Becoming Healthy teaches middle schoolers about exercise and nutrition . The organization has helped about 4,000 children since 2004 . Do you know a hero ? Nominations are open at CNN.com/Heroes .