Mohamed Ahmed Noor was under no illusions when he agreed to take on the job of mayor of Mogadishu, capital of Somalia. He was living in the relative safety of London when the offer was recently made. He sat his family down and told them he may not be coming back. 'I explained the dangers of the job, that I may be killed and that one day they may hear on the news that the mayor of Mogadishu has been assassinated, or killed in an explosion.'