Honorary degree for UN chief

U.N. Secretary-General Ban Ki-moon, left, shakes hands with Singapore President Tony Tan Keng Yam at the Istana, the official residence and office of the president of Singapore, Tuesday, after receiving an honorary doctor of letters from the National University of Singapore (NUS) for his international efforts to promote sustainable development as well as global peace and security. The honorary degree is the university’s highest form of recognition for outstanding individuals. / Courtesy of the NUS