CARE CEO Helene Gayle is on the line this week. The medical doctor from upstate New York tells Mark how she became the head of one of the largest international humanitarian relief NGOs on the planet. And prior to her work at CARE, Dr. Gayle had a twenty year career at the Centers for Disease Control where was at the front line of the fight against AIDS since the 1980s. She discusses how the fight against AIDS has changed over time and describes the origins of US policy to tackle AIDS internationally. Have a listen.