OSHA states that you have the right to a safe and healthful workplace, free of serious recognized hazards. While we may think only the "obvious" hazards in our workplace are potentially dangerous, such as machinery, chemicals, noise, or traffic, there is something that is just as dangerous that we may not be aware of.
A hazard is defined as a chance; a chance of being injured or harmed by a possible source of danger. Jobsites are filled with many different hazards- whether it's the task you are performing, task others are performing around you, equipment, chemicals, heat sources, or weather conditions. Hazards should be recognized and eliminated through engineering controls, administrative controls, and as a last resort, personal protective equipment.
According to the FBI, in 2014 and 2015 alone, a total of 40 active shooter incidents occurred in the United States. While the average number of incidents per year is increasing, the statistical risk of being affected by an active shooter is still relatively low for any given employer.