On Africa News Tonight: U.S. Treasury Secretary Janet Yellen Friday wrapped up her 10-day Africa tour in South Africa, following stops in Senegal and Zambia where she met with authorities, entrepreneurs and climate change philanthropists to further discussions on how Washington can improve relations with the continent.  Pope Francis is set to travel to Africa next week where he will visit the Democratic Republic of Congo and South Sudan, at a time experts say the Catholic church is witnessing its fastest growth on the continent. For this and more, stay tuned to Africa News Tonight!