The annual campus showcase for students, their supporters, alumni and the San Luis Obispo community — will take place April 16-18, 2015. The 22nd annual event, themed “This is the Mustang Nation,” will give attendees an opportunity to explore the enriching aspects of the Learn by Doing philosophy at Cal Poly, one of the nation’s top polytechnic universities, while sampling life in San Luis Obispo, which media mogul Oprah Winfrey dubbed America’s Happiest Town in 2011.