NEW YORK, NY - SEPTEMBER 24:  Secretary-General Ban Ki-moon speaks at the opening of the annual United Nations (UN) General Assembly on September 24, 2013 in New York City. The use of chemical weapons in Syria and Iran's nuclear ambitions are expected to feature heavily during the 68th General Assembly, with U.S. President Barack Obama and Iranian President Hassan Rouhani scheduled to speak.  (Photo by Spencer Platt/Getty Images)