line time By ronald pacheco Period: Dec 24, 1978 to Dec 25, 1978 linea del tiempo https://www.google.com.co/search?q=imagen+de+estudiantes&espv=2&source=lnms&tbm=isch&sa=X&ved=0ahUKEwjHvai-wr_OAhUEGh4KHdx9DuQQ_AUICCgB&biw=1366&bih=667#imgrc=zUHM68fgkEtXAM%3A