A group of Ukrainian protesters has sailed a yacht close to a Russian warship docked in Cape Town ahead of South Africa-hosted war games with the Russian and Chinese navies; The U.N. says at least 73 migrants are presumed dead in a shipwreck off the coast of Libya; And, Cameroon's health ministry has dismissed a report of two suspected cases of Marburg virus in the country after the first deadly outbreak in neighboring Equatorial Guinea.