In 2001, an operation known as "Dark Winter" was launched which was a real-world exercise that tested the emergency response to a bioterror attack on the United States. The simulation spiraled out of control within a few days, and predicted a "breakdown in essential institutions" civil disorder, and massive civilian casualties. This event came true years later in November 2015, when a virus was created that attached to bank notes on Black Friday which caused a pandemic on an international scale.