It’s College graduation time and many universities throughout the nation are preparing to hold their annual commencement ceremonies. One of the highlights of the ceremony is the guest speaker and this year is certain to not disappoint as prominent celebrity guest speakers from President Barack Obama to philanthropists Bill and Melinda Gates are scheduled to deliver addresses in the next month. This past weekend “Science Guy” Bill Nye delivered the commencement address at the University of Massachusetts, while US Navy Admiral William H McRaven spoke at the University of Texas commencement and Secretary of State John Kerry handled the address to…