US Secretary of State Hillary Clinton should put a strong emphasis on how best to manage natural resource wealth and avoid conflict and corruption on her official tour of Africa this week...Among the seven countries she will visit, Angola, Liberia, the Democratic Republic of Congo, and Nigeria are key examples of how abundant natural resource wealth - such as oil, minerals, and timber - can be more of a curse than a blessing, causing or exacerbating conflict and corruption. [refers to Sonangol, Samling]