Can Britain stop knife crime? Last year 99 young people were killed with a knife. Most agree that action is needed to stop more deaths.
Stabbed to death outside the school gates
Khayri Mclean: The teenagers who killed him will serve 18 and 16 years in prison. Glossary
Experts - Someone who knows a lot about a particular subject.
Exploited - When someone is using something or someone else, often hurting them.