By Ed GodfreyOutdoors editoregodfrey@oklahoman.comThe annual Oklahoma Wildlife Expo will be Sept. 28-29 at the Lazy E Arena and Ranch in Guthrie.When it began 15 years ago, one of the goals of the Wildlife Expo was to introduce the outdoors to newcomers who hopefully would become future hunters and anglers.It’s worked better at retaining the state's hunters and anglers than creating new ones.