Source: Christian Science Monitor
Country: Central African Republic, Egypt, Iraq, Jordan, Lebanon, Mali, Somalia, Sudan, Syrian Arab Republic, Turkey, South Sudan (Republic of)
On Aug. 19, 2003, a cement mixer filled with explosives slammed into the United Nations headquarters in Baghdad, Iraq, killing 17 people, including the top UN envoy to the country, Sergio Vieira de Mello. The tragedy underscored the persistent danger of humanitarian aid work in conflict zones, and prompted the UN to begin annually marking Aug. 19 as “World Humanitarian Day.”