The day that became known in Northern Ireland's history as Bloody Sunday ? when thirteen civilians were shot dead by British soldiers at a civil rights march in Londonderry on January 30, 1972 ? remains a controversial flashpoint in Northern Ireland's history. It triggered three decades of bitter and sectarian violence known as the Troubles, which claimed more than 3,600 lives.
But on Tuesday, the longest and most expensive legal inquiry in British history found all thirteen civilians innocent. British Prime Minister David Cameron said the deaths were "both unjustified and unjustifiable."
We're joined by the BBC's Ireland correspondent Ruth McDonald, who was in Londonderry, Northern Ireland when the report was received by cheering crowds yesterday.