Boston Bombing

When i heard about the boston bombing it just made me think what is the world coming to. Why would anybody want to hurt total strangers that did nithing to them.When i watch it in on the news they said that the number of people that died was a total of 3. But still even if its not hundred or a couple of thousand people died that didnt have to die.I think they should find the person that did it and send them to prison for the reason of there life.