U2 hits the iHeart Radio Festival (23 Sept)

"There's something about performing our songs in front of a large crowd which works. It's to do with the fact that a lot of those people at those shows are there to celebrate not just their favourite band or a favourite band, but actually part of their history and their life and the music that they have grown up with. As much as we're getting applauded, I think people are also applauding themselves and their experience and their life." - The Edge