One of the primary risks of being a firefighter is that of personal physical injury. Firefighters are susceptible to burns, smoke ＿＿（51）＿＿ and crush injuries from collapsing structures. They can suffer from heat exhaustion, as well as long-term job-related illnesses such as asthma, persistent coughing, heart disease, cancer and lung damage. ＿＿（52）＿＿ the highly physical nature of the job, all matter of bodily harm can befall firefighters in the line of duty. Some physical fallout from the profession may not materialize ＿＿（53）＿＿ years down the road. In addition to the physical perils, firefighters face the potential for mental trauma, particularly in situations involving mass ＿＿（54）＿＿ . As first responders on the scene, firefighters and other rescue personnel are often faced with the high stress, high stakes environment of trying to attend to as many people as possible, remove them from danger and assist in aiding treatment, often ＿＿（55）＿＿ their duties in tenuous or unfolding situations. The elevated stress levels don't always dissipate when they leave the scene.