Sub-Saharan Africa is also home to 400 million of the world's poorest people.

The extraction of oil, coal and minerals brought, and still brings, a cost to the environment.

But more than anything else, for the British folks Irish people were all terrorists. So when we went to Britain, it was always a lot of resistance to U2. And that's why we came to America.

The most powerful idea that's entered the world in the last few thousand years - the idea of grace - is the reason I would like to be a Christian.

Because you know when you first become famous, you start walking a little different because people are staring at you.

It's a privilege to serve the poor, to be servants of noble Africans, but I better belong in the rehearsal room or in the studio with my band. That's where I want to be and I still wake up in the morning with melodies in my head.

There was a moment when Prince did rock & roll with a sponge-y seductive sound. I think that's what was in our head for 'Get On Your Boots.' But actually, the song is much more punk rock.