The Algerian foreign minister Abdul Aziz Bouteflika (seated, moustache) and members of his delegation have an informal discussion before the opening session of the emergency Organisation of African Unity ( OAU ), conference began in Addis Ababa , Ethiopia 15th November 1963 The conference called to discuss the current Moroccan-Algerian border quarrel was opened by Ethiopia 's Haile Selassie , who warned that Aftrica 's ability to solve its problems free of outside interference is at stake in the border dispute . 18th November 1963