In the USA, members of the public are legally entitled to use extreme force in defence of themselves, family, friends and employees, if they are in severe danger from an attacker. Here, we are allowed to use reasonable force in the same situation. However, it is our citizen's duty to go to the aid of someone in that situation, sometimes resulting in the helper being prosecuted. I think that the American law is less confusing and more protective of the victim than in the UK. What are your views on this?