In the U.S. Navy, we say that every sailor is a firefighter. That's because when a fire breaks out on a ship at sea — a real threat given the combustible mixture of fuel, ammunition, electrical circuits and stored supplies — the entire crew is trained to step up and douse it. It's not like you can just walk across the street and let the blaze burn itself out. I have fought fires several times, and here is the most important lesson: Never underestimate the power of a fire to “re-flash.” If you put out the initial flames but leave smoldering material, there is a high possibility of it leaping back to life. Navy protocol is to set a watch of sailors prepared to go back into action if a re-flash occurs.