Clusters air spreading at colleges across the country. Michigan State just cancelled in person learning for the fall semester. Classrooms at Notre Dame are also closed. For now, Here's CBS News correspondent David Beg. No, the spike in cases is very serious, and we must take serious steps to address it. This is the president of Notre Dame University, Reverend John Jenkins. He says he's prepared to make any changes necessary. He's moving classes online for the next two weeks after a surgeon cases 147 since the campus opened on August, the third Most are linked to an off campus party that the's steps are not successful. We will have to send students home. As we did last spring.