Don’t be alarmed… it’s just a drill. Emergency responders will participate in a disaster exercise Thursday night at the St. Cloud Regional Airport. The exercise is designed to improve the response of public safety officials in the event of an air crash crisis. Emergency responders from 24 agencies will practice transporting air crash victims to the hospital by ground and air ambulance. The exercise will take place between 5:00 and 8:00 pm Thursday, and will have the appearance of a real disaster.