Graduation festivities got under way at the University of Notre Dame on Saturday - as well as another day of demonstrations over President Barack Obama's appearance Sunday. University spokesman Dennis Brown said there were no reports of protests on campus at any of the ceremonies held by various schools, centers and institutes. For the most part, the only difference on campus was the heightened security for Obama's visit, he said. Students with their gowns on walked along happily Saturday afternoon with their parents apparently oblivious to the protest just a few hundred feet away. Protesters say Obama shouldn't be allowed to speak at the Roman Catholic university because of his support of abortion rights and embryonic stem-cell research.