Gayle Smith is the president and CEO of the ONE Campaign and the former administrator of the US Agency for International Development (USAID). She joins David to talk about her two decades spent in Africa as a young journalist and NGO worker, insights from her career in global development and humanitarian assistance, efforts to combat the Ebola epidemic in the Obama administration, and more.To learn more about how CNN protects listener privacy, visit cnn.com/privacyLearn more about your ad choices. Visit podcastchoices.com/adchoices