Africa's big men like their comforts, no matter where they are. Two days ago the skies above Lusaka were thick with circling presidential jets, waiting for permission to land. The big men, their wives and their retinues of heavily armed guards (each delegation restricted to six pistols) are in Lusaka for the annual summit of the Organisation of African Unity (OAU), Africa's answer to the United Nations. The leaders' club is supposedly the mark of unity among the African brotherhood, yet in its 38 years of existence the continent has been characterised by division and bloodshed.