Is Murder ever justified

Murder ? How can you define murder ? Murder despite what some may believe is the unlawful killing of another. Murder is never justifiable because there is never a good reason to murder somebody. Self defense on the other hand is justifiable because it is one of our natural and constitutional rights has human beings and citizens of the United States Of America. I in no way agree with murder but I do believe in self defense. I believe that every citizen once they reach the legal age has the right to carry a weapon in there vehicle and or on there person. There are many people in our government who believe that this is wrong. They call self defense murder. It is not because it is legal to defend your self. I have but only one question for these types of people. You are walking down the street and someone walks up to you and pulls a knife on you, and says give me all you valuables. they threaten your life, What do you do? The final answer to the question is no, murder is never justifiable.