Is America ruled by fear? Four young people made harmless mistakes. So why were they shot?
Shot for knocking on the wrong front door
Recovering: The man who shot Ralph Yarl, 16, has now been charged with criminal offences. Glossary
USA - The United States of America is a country in North America. It has a population of 329 million.
Laws - Rules that everyone must follow.
Trustworthy - Someone or something you can trust.