Workplace violence is a unique hazard in the occupational safety and health arena. It is not governed by a specific standard, and many businesses do not have occasion to address it, or only need do so in the most cursory terms. But, in some industries, it is one of the most significant threats to the safety and health of employees covered by the Occupational Safety and Health Act, 29 U.S.C. § 651 et seq. (Act). The hazard is particularly acute in the healthcare industry, where, according to the Bureau of Labor Statistics, U.S. healthcare workers suffered 15,000 to 20,000 workplace-violence-related injuries every year from 2011-2013 and accounted “for nearly as many injuries as all other industries combined.” (Ex. C-13 at 3; C-12 at 2-3). The particular threat of violence faced by a healthcare facility depends on the type of services it provides, the patients it sees, and whether it is open to the public. (Ex. C-12)