Iowa State University Spring Commencement Ceremony, May 7, 2011

University of Arizona President Robert Shelton speaks at the undergraduate ceremony, with President Gregory Geoffroy presiding. An estimated 2,703 students receive bachelor's degrees. Chemist Harold Scheraga and Physicist and former faculty member Robert Shelton are awarded honorary Doctor of Science degrees. Includes a short performance by the 30-member choir from Simon Estes Music High School, Cape Town, South Africa. Recorded in Hilton Coliseum, Ames, Iowa, May 7, 2011.