Michael Ketterer on AGT probably had a story filled with hopes and challenges. He could have been a singer or an act with some special skills. His story might have started from his love for performing arts. Maybe he practiced for years in his local community or at home. Then he decided to take the big step and audition for AGT. On the show, he might have had to deal with the pressure of performing in front of a large audience and the judges. There could also be some heart - warming aspects to his story, like how his family or friends supported him throughout his AGT journey.
I'm sorry, I'm not very familiar with the specific full story of Michael Ketterer on AGT. You can try searching on official AGT websites or entertainment news platforms for detailed information.