SERGIO DUARTE – Brazilian diplomat (retired). Former Ambassador to Nicaragua, Canada, China and Austria. Alternate Representative to the Conference on Disarmament, 1979-1985. Representative to the UN General Assembly First Committee and Disarmament Commission, 1979-1985.  Representative of Brazil to the CTBTO and Governor at the IAEA Board of Governors, 1999-2002. President of the NPT 2005 Review Conference. Chairman of the IAEA Board of Governors, 1999-2000. United Nations High Representative for Disarmament Affairs, 2007-2012.