Oklahoma fraternity racial incident just one of many as campuses grapple with lingering racism

College students and administrators are struggling to deal with racist incidents on campus despite repeated condemnations.

This week alone, Bucknell University expelled three students for making racist comments during a campus radio broadcast, and Duke University said one of its students placed a noose in a tree on campus. Earlier, spray-painted swastikas and nooses were found at the State University of New York's Purchase campus, and a former University of Mississippi student was indicted for tying a noose on the statue of the university's first black student.

National attention turned to the issue earlier this year after a University of Oklahoma fraternity was caught on video singing a racist chant.

University administrators say they are working with students to confront racism, and are punishing perpetrators.