Ben Carson

Johns Hopkins Hospital surgeon Dr. Ben Carson, right, signs a book for Delegate William Frank, R-Baltimore County, in Annapolis, Md., Friday, March 8, 2013 after Carson, who is director of pediatric neurosurgery at Johns Hopkins, spoke at a legislative prayer breakfast. Carson said Friday that while people have been urging him to run for president, he doesn’t aspire to run for office. (AP Photo/Brian Witte)