Self-Contained Breathing Apparatus (SCBA) are one of the most important items of personal protective equipment used by firefighters and rescue personnel. SCBA allow firefighters to enter hazardous environments to perform essential interior operations including offensive fire attack, victim search, rescue and removal, ventilation, and overhaul. They are also used at non-fire incidents involving hazardous materials and confined spaces where there is a threat of toxic fumes or an oxygen-deficient atmosphere. There have been several well-documented incidents during the past 10 years where SCBA...