Bloody Sunday: Major challenge for Cameron
It is not a report he commissioned.
He regrets the amount of time and money spent on it.
It has the potential to re-open old wounds and to open new ones in Northern Ireland at a time when anxieties about the resumption of violence remain.
The Saville Report focuses on a tragedy which happened when David Cameron was just five years old.
Even Tony Blair's chief of staff has confessed that he had second thoughts days after the decision to order it was taken.
Yet it fell to this prime minister to negotiate the challenge of presenting the report into Bloody Sunday to the Commons and the country as a whole.
David Cameron did so powerfully, making no attempt to "soften" the verdict - there would, he said, be no point in doing so after a report that left "no doubt" and contained "no ambiguities". He declared that he and the government were "deeply sorry". He insisted that "you do not defend the army by defending the indefensible".
What gave his statement power though was the fact that it began with a personal declaration that as someone "deeply patriotic I never want to believe anything bad about our country. I never want to call into question the behaviour of our soldiers and our Army who I believe to be the finest in the world."
I expected some MPs to react by demanding that there be enquiries into the Bloody Mondays, Tuesdays, Wednesdays and so on, caused by the IRA.
No-one did so, although the DUP's Willie McCrea asked David Cameron "how do we get a closure, justice and get the truth?" for the three members of his own family and many other people who were brutally murdered.
It is a question for which there is no real answer but in Westminster this felt like a page being turned.
The test, though, will come not here but in Londonderry/Derry and in Belfast and in the minds of a generation of young men for whom Bloody Sunday and what followed it are stories about the past which can either provoke further violence or convince them to declare "never again".
Update 17:55: More anger was expressed in the Lords than the Commons.
Lord (Ken) Maginnis accused the Saville inquiry and the government of being "one-eyed" in its emphasis on just 13 of the 180 violent deaths in the province in the preceding year, saying that "The 13 deaths are regrettable, but no more regrettable than the other 167, the other 94% of the people who died that year."
Lord Morrow, a DUP member of the Northern Ireland Assembly, said there was a danger of creating "a hierarchy of victims" and warning that "the Saville report today has the potential to set Northern Ireland back 30 years rather than take it forward."
And the former Conservative armed forces minister, Lord (Archie) Hamilton of Epsom, said that since the time of Bloody Sunday, "I think people will find it very difficult to understand if that same threat of prosecution is not withdrawn from our troops for offences that, let's face it, may have been committed 40 years ago or the best part of it."