US Vice President Kamala Harris calls for more "innovation" and entrepreneurship in Africa in a speech underlining her optimism for the continent where she is on tour. Harris addressed young Ghanaians at the Black Star Gate in Accra, a monument commemorating Ghana’s independence from colonialism. She expressed her hope for the future, saying it is “the young leaders who will solve problems that we haven’t yet identified with solutions we can’t even yet imagine.” IMAGES AND SOUNDBITES