In 1967, the birth of the People's Republic of South Yemen was proclaimed in Aden by the National Liberation Front.

CNN: Tuesday,

He has been on missions in Liberia, Yemen and Zaire, now the Democratic Republic of the Congo.

CNN: Annan gets special adviser on Iraq

From Syria to the Sahel, Yemen to Sudan, the eastern Horn of Africa to the eastern Democratic Republic of Congo, these unarmed aid workers risk their lives to provide life-saving assistance to millions of men, women and children.

WHITEHOUSE: Statement by the Press Secretary on World Humanitarian Day