In my opinion， it is not so easy to be a hero. First， a hero must be brave. When he sees someone do a bad deed， he must be brave enough to catch him or to stop him. Secondly， he must be strong enough； otherwise instead of catching the criminal， he himself will be beaten to death. There are fewer heroes now for several reasons. I think the most important reason is that people dont want to mind other peoples business because they think it will do them no good. But I think it will do them no good. But I think society calls for heroes. Fighting against crimes is not just the job of the police. Its the duty of every citizen.