Brazilian photographer Sebastião Salgado's first big splash on the world scene was the photographs he titled Workers, documenting the conditions of work in the harsher places of the world. Published as a book in 1993, the photographs were shot around the world in the 80s and early 90s. The most famous are from the Serra Pelada gold mine in Brazil (above and below).
And below, some images of the men who went to Kuwait in 1991 to put out oil field fires. To me Salgado is one of the great artists of our age.