Ubushakashatsi bushya bwakozwe na Kaminuza ya Ohio State yo muri Leta Zunze Ubumwe z'Amerika, bwasanze mu gihe cy'imyaka irenga gato 20 y'amavuko ari bwo ubwonko bwacu ku nshuro ya mbere buba bwiganjemo ibitekerezo byo guhanga udushya.
