https://www.cnn.com/2018/12/19/us/ai...BORpRfN91ymFjs
On an August morning at Wright-Patterson Air Force Base, the medical treatment facility was holding a mass casualty drill. Personnel acting as the injured streamed in.
Across the base, unbeknownst to the medical staff, a second active shooter drill was taking place, with a second set of people pretending to be injured.
Then a real injured person came on the scene: someone who worked at the medical facility hurt their ankle jogging on base, and called another employee screaming and crying.