My Definition Of A Firefighter's Hero

My definition of a hero is someone who has done something good for someone or the world. For example, I consider Martin Luther King Jr gave rights to African Americans in the United States. A hero is someone who does something that people can't do like firefighters are considered hero's to me because on the day that 9/11 happened they were the ones who ran into the burning buildings to try to get people out of both buildings. When the firefighters went inside, cops stayed outside that is why I consider the firefighter's hero's because they risk they're life's to save other life's. From people, they don't even know.