U2's guitarist, The Edge,
told an Irish radio station that Bono got a call from a producer, Swizz Beats, about the Jay-Z collaboration. Bono settled on an idea during that phone call and then the group "wrote a song, finished, recorded, and sent it back to them," said The Edge. When Bono completed its portion of the song, Swizz Beats
posted a TwitPic where he and the U2 singer hold a handmade sign that reads: "One Love Haiti."
If it's anything like the "Heart of the City (Ain't No Love)/Sunday Bloody Sunday" Jay-Z performed at Glastonbury, it should be