Westport, IN — The Westport and Letts Community volunteer fire departments responded to an alarm around 10:45 last night at South Decatur High School. Firefighters arriving at the school were greeted by seniors who said they were planning a prank for this morning when administrators would be in the building. But the prank went off way ahead of schedule: the school was filled with synthetic smoke – or fog – which firefighters from both departments cleared out. Crews also re-set the alarm.