We speak with the director of the National Institute of Allergy and Infectious Diseases to find out about international cooperation with scientists in China on the coronavirus outbreak, America's preparedness for infections here and some experimental treatments being tested. South Sudan's political rivals President Salva Kiir and rebel leader Riek Machar have announced they will agree to share power and form a unity government by Saturday. Also, what inspired author Nazila Fathi to write two children books to help Iranian American kids feel proud of their heritage.