In #Abington, #Pennsylvania, Dorothy Kalkbrenner, better known as Miss Dottie, has helped students cross the street for nearly half a century. At age 89 and after 47 years of service, she's retiring. #DavidMuir shares her story, #AmericaStrong. #WorldNewsTonight #News #ABCNews #retirement #crossingguard #school #safety @ABC News