Bono: U2's new album is 'personal' and was hard to make

Bono struggled to write U2's 'personal' new album.

The Irish rocker and his band mates, The Edge, Adam Clayton and Larry Mullen Jr - who released their new record 'Songs of Innocence' for free to all iTunes Store customers and U2's website subscribers - found composing the tracks hard as it required them to revisit past memories.