An ex-British paratrooper faces murder charges over the Londonderry killing of two people on Bloody Sunday in 1972 but victims' families want more prosecutions.
The Bloody Sunday families have vowed to continue their campaign for justice, after it was announced that only one former British paratrooper is to be prosecuted over the shootings 47 years ago.
On Sunday, January 30, 1972, British troops opened fire during an unauthorised march in the Bogside, a nationalist area of Londonderry.
A veteran, now known as Soldier F, will face charges for the murders of James Wray and William McKinney and the attempted murders of Joseph Friel, Michael Quinn, Joe Mahon and Patrick O'Donnell in Londonderry in 1972.
However, the PPS said 16 other former soldiers and two suspected ex-members of the Official IRA will not face prosecution.
Thirteen civil rights demonstrators were shot dead on January 30 1972, on one of the most notorious days of the Northern Ireland Troubles.
While welcoming the news for the six families directly impacted by the decision to prosecute Soldier F - declaring that a "victory" - the campaigners said they would keep fighting for the other dead and injured.
John Kelly, whose 17-year-old brother Michael was shot dead, said: "The dead cannot cry out for justice, it is the duty of the living to do so for them. We have cried out for them for many years, and now we have succeeded for them. Do not deny us justice any longer."
The families had marched together from the scene of the shootings in Derry's Bogside neighbourhood to a city centre hotel on Thursday morning to be informed of the PPS's long-awaited decisions.
Mr Kelly highlighted there were legal means of challenging the decisions not to prosecute.
"The Bloody Sunday families are not finished yet," he said.
UK Defence Secretary Gavin Williamson confirmed the government would support Soldier F and pay his legal costs.
"We are indebted to those soldiers who served with courage and distinction to bring peace to Northern Ireland," he said.
But Mr Kelly heavily criticised Williamson's for his support for measures to potentially protect veterans from historic prosecutions, calling on the authorities to investigate whether his past remarks, and similar comments by other politicians, "broke the law".
As well as the 13 who died on the day, 15 others were shot and injured. One of the injured died months later from an inoperable tumour and some consider him the 14th fatality. The victims were all unarmed Catholics.
Bloody Sunday helped galvanise support for the Provisional IRA early in the Troubles. An image of a Catholic priest waving a bloodstained handkerchief as he tried to help a victim to safety went around the world.
A public inquiry conducted by a senior judge shortly after the deaths was branded a whitewash and a campaign was launched for a new public inquiry. A fresh probe was eventually ordered by then prime minister Tony Blair in 1998.
A decade-long investigation by Lord Saville concluded that the troops killed protesters who posed no threat.
Following the inquiry's conclusion in 2010, then prime minister David Cameron said the killings were "unjustified and unjustifiable".
A murder investigation by the Police Service of Northern Ireland (PSNI) followed and files on 18 soldiers were submitted to prosecutors in 2016 and 2017 for consideration.
One has since died. Four other soldiers included in the Saville Report died before police had completed their investigation.