Kevin McCarthy, director of the London Education Authority, shows the certificate after 295 students from more than 100 countries and regions tossing their mortar boards in a Guinness World Record attempt for the most people throwing mortar boards simultaneously in London, Britain, May 30, 2012. [Xinhua]

Photo taken on May 30, 2012 shows 295 students from more than 100 countries and regions tossing their mortar boards in a Guinness World Record attempt for the most people throwing mortar boards simultaneously in London, Britain. [Xinhua]

Photo taken on May 30, 2012 shows 295 students from more than 100 countries and regions tossing their mortar boards in a Guinness World Record attempt for the most people throwing mortar boards simultaneously in London, Britain. [Xinhua]