I support workplace clean air. But a federal ban on smoking would mean that you couldn't smoke in your own home. I don't care what people do in their home.

So when we're really addressing issues like poverty, you can't do that without addressing the real driver of some of those, which is stable homes, families. So that's why to me those issues are important. They're not frivolous. They're critical economic issues.

I've had the privilege of working with Bono for the past few years in the One Campaign to fight AIDS and hunger and disease around the world. Bono is an Irishman and a great humanitarian. And I remember him telling me of his admiration for America.

I treat my wife very differently than I treat my chums and my pals. I wouldn't worry about calling them on Valentine's Day, opening the door for them, or making sure they were OK.

Parents have no greater responsibility in this world than the bringing up of their children in the right way, and they will have no greater satisfaction as the years pass than to see those children grow in integrity and honesty and make something of their lives.

Most women in my family start to get sick and start dying in their 40s, and I am going to be very happy to become 50 and 60. I love getting older.

I've got a really great family round me, two sisters and an older brother and my mum and dad. Everybody's equal.

My wife and I have four children, and none of them are in lab science, so clearly I returned home at night and presented a fairly unattractive example of a scientific life.