May 2, 2013 — Dr. Ing. Raul Delgado Sayan, president of the CESEL S.A. engineering firm in Peru, was the guest speaker at an event on mass transit organized by Moraima Guzman-Bambaren and Nick Varner, graduate students in The Sam Nunn School of International Affairs. The event was held March 27 in the Bill Moore Student Success Center.