The Firemen's Fund upcoming documentary, "Into the Fire," aims to give us some insight into this question.

"Through intimate interviews with firefighters from big-city engine companies and small-town volunteer fire departments, the film addresses why firefighters risk their lives to save others - in a time when budget cuts and greater demands are making their jobs more challenging than ever."

"Into the Fire" airs nationally on The History Channel on October 13 at 8PM/7C and October 22 at 4PM/3C.