Your brother truly is a hero. How do you feel about that? Do you feel proud, happy, worried, jealous? Write about what you really feel.

As a brother, has he changed towards you? Has he become better towards his family? What do you admire about him? How does he strike you? As a rolemodel? What characters and virtures would you like to have just like him? Bravery? Courage? Sacrifice? How do you feel towards him now? Are you happy? Are you sad?

I hope you got some ideas from this. I suggest that you even interview him to learn more about what happened, how it happened, details, facts, and instances! Be creative!

This is a really good topic to write about since you actually have a TRUE hero! Alive! All the best with your writing. Hope this helps.