Former Presidents George H. W. Bush and Bill Clinton smile on the podium after receiving their honorary degrees at Tulane University Commencement in New Orleans on Saturday May 13, 2006. (AP Photo/Alex Brandon, Pool)

Photo by: ALEX BRANDON

Former Presidents George H. W. Bush and Bill Clinton smile on the podium after receiving their honorary degrees at Tulane University Commencement in New Orleans on Saturday May 13, 2006. (AP Photo/Alex Brandon, Pool)