I find myself thinking this, from time to time. It's easy to look at a mixed-martial arts fighter, or coal miner, or sweat-shop textile factory worker, or a drug dealer and say: "why not do something less dangerous?"

But the reality is that for many people a safe career is not an easy or even realistic choice. If your options are to live in a ramshackle apartment, never own a car, not have enough money to get married, send your kids to school, bury your family members, or retire, it's harder to turn down a more lucrative and more dangerous career.

I can't pretend to know the motivations of all of the workers, but I am sure that at least some of them made the decision to sacrifice personal health and safety for their future, and their families future, which I think is a reasonable definition of heroism.