INDIANAPOLIS >> IndyCar officials are trying to make racing safer and more appealing in 2016.After spending a busy offseason trying to stop cars from flipping and limiting the dangers of flying debris, Mark Miles spent Tuesday explaining how rules changes could help.The most notable difference this season will be the addition of rear beam wing flaps, something similar to what NASCAR has been using on the roofs of its cars and that is designed to keep the lighter IndyCars from going airborne when they are rolling backward.