Galveston County Daily News, May 30, 2007 GALVESTON - Benjamin S. Carson Jr., a neurosurgeon renowned worldwide for his work separating conjoined twins, will be principal speaker at the University of Texas Medical Branch School of Medicine commencement Saturday. The 197 students due to receive medical degrees at Moody Gardens will hear him speak on the role of doctors in national and global healing, including the responsibility associated with advanced education, and his thoughts on human potential and true success. UTMB is graduating one of the most diverse medical school classes in its 117-year history, with about 21 percent minority graduates. Altogether, 164 of them are Texans; 41 are from Harris County and five are from Galveston County. Almost half of the graduates are women.