Heads of State at the Organization of African Unity (OAU) Summit in Somalia, 1974. Somalia President Siad Barre, Uganda’s President Idi Amin Dada, Republic of Congo President Marien Nguabi, Zaire’s Mobutu Sese Seko and Benin President Mathieu Kerekou. Kenya's renowned photojournalist Mohamed Amin, also known as 'Six Camera Mo' captured some of Africa's defining moments and photographed almost every African leader in the 20th century.