Ohio State University says people planning to attend President Obama's commencement speech on Sunday should allow extra time to get through security lines. University officials say guests should arrive at Ohio Stadium by 7:30 a.m. for the President's noontime speech, in order to get through airport-style screenings. Backpacks, coolers, all liquids, noisemakers and signs will not be allowed in the Stadium. 10 thousand students are expected to graduate.