Omar Bongo, Ahmed Sekou Toure and Lt. Col. Mathieu Kerekou.

Three West African leaders at the Organisation of African Unity (OAU) Summit: From left President of Gabon Omar Bongo, President of Guinea Ahmed Sekou Toure and President of Benin Lt. Col. 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.