reporter rob kirkpatrick shows us the pushback from graduates. >> president joe biden delivered the commencement speech at morehouse college sunday. the historically black college, located in atlanta, is the ama mater of doctor martin luther king junior, who led nonviolent protests during the civil rights movement, something the president reflected on. >> i want to say this very clearly. i support peaceful, nonviolent protest. your voices should be heard, and i promise you, i hear them. >> as biden began speaking, a student in the audience unfurled a palestinian flag and held it up. some students also turned their chairs away from the president. during his address, i had students ask me about it. >> what if we, you know, turned our backs on the president or turned our chairs? and i said to them, i'll be embarrassed, but that's not your problem. >> pro-palestinian protests have gripped college campuses across the nation in recent months. there have been mixed reactions within the morehouse community to mr. biden's presence on campus. >> if our guest star at commencement is the reason why we have