With U.S. Secretary of State Hillary Clinton concluding her African visit last week, the South Africans are doubting her real purposes, local media said on Monday."When Barack Obama made his first trip to Africa in 2009 as the newly-elected U.S. president, it was expected that South Africa would be his next on his hectic schedule before his first four- year term ends,” the Business Day said in its editorial.On July 11, 2009, U.S. President Barack Obama arrived in the western African country of Ghana for a historical two-day visit.Many South Africans believed that the Obama administration would actively engage with South Africa, because the country is the largest economic entity on the African continent and the world was expectingit could play a decisive role in shaping a prosperous Africa.