In the days after 9/11, RTÉ 's Rattlebag programme invited artists to somehow respond to the horror that continued to unfold in New York - listen above.

Relecting on an act of unspeakable violence, Sinéad O'Connor, Chris De Burgh, Bernadette Greevy, Juliet Turner, Donal Lunny, John Hurt, Julie O'Callaghan, Dennis O'Driscoll, Mairéad Ní Dhomhnaill and Neilidh Mulligan each found a voice through song or poem to honour the memory of those who perished.