Heroic professions

In my opinion a heroic profession is the one in which people risk their lives in order to learn something new or to save the lives of other people.
Now I want to tell you what professions I personally admire. First of all, it's ussual people's profeshions.
It’s very hard to be a fireman.You never know at what time you must immediately jump into the car and rush to a burning object.You should act very fast, because each lost minute can one human life