bloody sunday and forgiveness

Prime Minister David Cameron of Britain offered an
extraordinary apology on Tuesday for the 1972 killings of
unarmed demonstrators by British troops in Northern Ireland,
saying that a long-awaited investigation into the violence
had left no doubt that the shootings were "both unjustified
and unjustifiable."

"On behalf of our country, I am deeply sorry," Mr. Cameron
said in a speech to Parliament. "What happened should never,
ever have happened."

The violent events on Jan. 30, 1972, in the Northern Irish
city of Londonderry, known as Bloody Sunday, triggered three
decades of bitter and sectarian strife in Northern Island and
became one of the most notorious single events in the recent
history of the Troubles, which claimed more than 3,600 lives.