raj shah is dedicating his life to solving the problems of health and hunger. after getting a medical school degree, he began his career at the gates foundation. from there, he joined the obama administration as the head of the usaid and now he's the head of the rockefeller foundation. had a chance recently to sit down with raj shah talk about his passion for solving the global problems. so tell us, what is the rockefeller foundation? i know about the rockefeller name. but what is the foundation and what does it really do? dr. shah: the foundation was created more than 100 years ago by john d rockefeller. the idea was very simple. to use science and innovation to lift up as many people around the world as possible. over that period of time, this foundation has helped create the field of modern medicine, invest in international public health, launch a green revolution through agricultural sciences that helped almost a billion people move off the brink of hunger and starvation. and today, our big focus is around climate and energy. david: so if i said to you i ha