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If you are a student at a public college or university in Arkansas, Colorado, Georgia, Idaho, Kansas, Mississippi, Oregon, Texas, Utah, or Wisconsin, the person sitting next to you in class may legally have a handgun under that collegiate sweatshirt he or she is wearing. In these 10 states, legislation allows students and faculty members who have concealed weapon licenses to bring their weapons, such as handguns, to campus. In 2014, bills proposing similar legislation were introduced in 14 states.
Charles Perrow described the 1979 Three Mile Island nuclear reactor meltdown as a Normal Accident. Normal accidents are a class of events produced when subsystems in risky, complex and tightly coupled systems fail. Tight linkages between subsystems propagate failure, and local breakdowns cascade into systemic collapse. Diane Vaughn applied the normal accident metaphor to the 1986 Challenger Disaster.