What is a description and backstory of a superhero you created?

I have two killer superheroes that have been running in the back of my mind in a while. The first one is a young man who was born with an extra organ attached to his lungs. This organ acted as a vacuum for all combustable materials that entered the body and as a second brain. When he felt like it, he could ignite the inside of that organ and then breath fire. As for being a second brain, it allowed him to control all internal processes consciously. Obviously, something like this was not easy to hide and military scientists found him. They exploited this gift he was given by injecting very large amounts of vitamins, nutrients and other things into his system. As a result, he became an incredibly healthy person, with things like an advanced immune system and a skeletal structure five times more dense than a normal persons giving him virtually unbreakable bones. One of the other things was a new type of "supercatalyst". It was injected into his system and he used his powers to mass produce more of those super catalysts. This allowed many things such as disease and poison passing through him faster and all wounds to heal at a rate one hundred times that it was before. He was equipped with a wingsuit and jet pack which combined with his ability to breath fire made him appear like a dragon, which the military realized and used it as an intimidation factor. He could breath fire as he was closing in on a building or plane from above and could crash through the ceiling and land on the floor virtually unharmed.

To sum it up, it's a guy who breaths fire, has unbreakable bones and fast healing wounds, and has a jet pack and can fly around and kick ass with. I was going to tell you about the other superhero but that would take too much more work.