Contract change affects services for public address Published May 25, 2011 By 81st Training Wing Public Affairs KEESLER AIR FORCE BASE, Miss. -- Starting Wednesday, due to cuts in the base visual information services contract, a self help/checkout process is required for all public address equipment, such as speakers, microphones, podiums and screens. Customers fill out an Air Force Form 1297 and are responsible for transportation and setup for all equipment. For more information, call 377-2793.