Obama declares to Africa: End tyranny, corruption MARK S. SMITH ACCRA, Ghana – An American president who has "the blood of Africa within me" praised and scolded the continent of his ancestors Saturday, asserting forces of tyranny and corruption must yield if Africa is to achieve its promise. "Yes you can," Barack Obama declared, dusting off his campaign slogan and adapting it for his foreign audience. Speaking to the Ghanaian Parliament, he called upon African societies to seize opportunities for peace, democracy and prosperity. "This is a new moment of great promise," he said. "To realize that promise, we must...