Should there be cameras everywhere in outdoor streets? My personal view is having cameras in inner cities is a very good thing. In the case of London, petty crime has gone down. They catch terrorists because of it. And if something really bad happens, most of the time you can figure out who did it.

I work hard because I love my work.

If you believe that all men are created equal, then a child's death in some other country is no less tragic than in the United States.

Vaccination is pretty special because you can do a vaccination campaign anywhere in the world. All you are doing is gathering women from the villages, getting them the vaccines and asking them to go around and find the children.

I was lucky to be in the right place at the right time. But many others were also in the same place. The difference was that I took action.

Our work in global health is about things like cutting childhood deaths, and every year we continue to make progress there.

There are several hundred people who stayed in the Ebola-affected countries and continued to do the work, put themselves at great risk because medical workers are the most likely to be infected because they're helping out when the person's health is deteriorating, including quite a bit of bleeding as they're getting very, very sick.