Profession, "fireman" - a very ancient, and in a way different from all others. Firefighters work in an ever-changing and often volatile environment. In a burning building in need of rescue may lack the normal structural integrity, and the means of access, such as stairs and elevators can be dangerous because of the fire. The work is often strenuous and many situations require the use of specialized personal protective equipment. Fire can cause to work in a variety of emergency situations such as traffic accidents, industrial disasters, floods, earthquakes, civil unrest, hazardous chemical or hazardous materials, aviation and maritime accidents.