If you hear sirens and observe smoke near the Atlantic City Airport on Saturday, don’t worry, its only a test. The Atlantic City International Airport (ACY) will conduct a full scale Emergency Preparedness Exercise on Saturday. The exercise, which will run from 8 a.m. to noon, is conducted every three years in compliance with federal regulations. No local roads will be closed, although increased emergency vehicle activity may occur during the drill on Tilton Road (CR 563) where it passes by ACY and the Tilton Road-Delilah Road intersection. The airport will remain open for business.