My brother Xan Rice is a journalist who works as the Africa correspondent for the Guardian. He is based in Nairobi, Kenya, but spends most of his time in the various hot spots of Africa – Sudan, Democratic Republic of Congo, Liberia, Somalia. He was in Mogadishu last week and was present when a gunman assassinated a Swedish cameraman called Martin Adler. His personal account of the shooting makes for some chilling reading: Some people freeze, most run. I run. Away from the sound - a sharp,...