Brazilians are to hold a referendum on 23 October on whether to ban the sale of firearms and ammunition to civilians. The authorities say it is the world's first nationwide vote on guns, and that it could set a precedent for campaigns in other countries. The BBC News website looks at some of the key issues surrounding the referendum. Why is the Vote Important for Brazil? The South American country has the second-highest number — behind Venezuela — of... (GunPolicy.org)