Port-au-Prince, Haiti - The U.N. mission chief who is missing along with more than 100 people in the rubble of the collapsed U.N. headquarters building in Haiti is a career Tunisian diplomat who wrestled with the Caribbean nation's grinding poverty, violence and deadly tropical storms.U.N. peacekeeping chief Alain Le Roy would not confirm French Foreign Minister Bernard Kouchner's report that everyone in the U.N. building, including Hedi Annabi, appeared to have died in the earthquake.

U.N. peacekeeping chief Alain Le Roy would not confirm French Foreign Minister Bernard Kouchner's report that everyone in the U.N. building, including Hedi Annabi, appeared to have died in the earthquake.U.N. officials said only that Annabi, a bespectacled 65-year-old career diplomat known for his modesty, is unaccounted for.

U.N. officials said only that Annabi, a bespectacled 65-year-old career diplomat known for his modesty, is unaccounted for.Annabi, who joined the U.N. in 1981, has been in Haiti since September 2007 when he took over as head of the U.N. Stabilization Mission in Haiti. That posting followed a 10-year stint as assistant to the U.N. secretary general for peacekeeping operations.

Annabi, who joined the U.N. in 1981, has been in Haiti since September 2007 when he took over as head of the U.N. Stabilization Mission in Haiti. That posting followed a 10-year stint as assistant to the U.N. secretary general for peacekeeping operations.Prior to joining the United Nations, Annabi served in Tunisia's foreign service and worked as an adviser to then-Prime Minister Hedi Nouira in the 1970s.

Prior to joining the United Nations, Annabi served in Tunisia's foreign service and worked as an adviser to then-Prime Minister Hedi Nouira in the 1970s.