Sergio Vieira de Mello was the top UN official in Iraq when he died in a truck bombing of the UN’s Baghdad headquarters in August 2003. Twenty-one others were killed and dozens wounded in one of the deadliest attacks on the UN in its 58-year history. De Mello had served in the United Nations since 1969 in some of the world’s most sensitive areas, including East Timor, Yugoslavia, Cambodia and Bangladesh. [includes rush transcript]