India just went 3 years with no cases [of polio]. Pakistan is our toughest location right now because some parts of the Taliban have not allowed vaccinators to come in and have even attacked vaccinators. We are hopeful this will get resolved since no one wants their kid to be paralyzed. I spend a lot of time making sure the polio campaign is doing the best it can. We have great computer models that help guide our activities.

You've got to be willing to read other people's code, then write your own, then have other people review your code.

Don't let complexity stop you.

Vaccines are extremely well tested; their safety is well understood. The false allegations about vaccines causing autism have been disproven. But there are still echoes out there confusing people.

I love nuclear. It does this radiation thing that's tricky. But they're good solutions. You know, it was interesting; recently, in Connecticut this natural gas plant blew up 11 guys. It just blew them up.

You need to understand things in order to invent beyond them.

Well, no one gives aid to Zimbabwe through the Mugabe government.