Bloody Sunday was one of the darkest episodes in Northern Ireland's Troubles.
Families of those who died march through the Bogside in Londonderry, Northern Ireland, ahead of an announcement over the prosecution of 17 former British soldiers and two former members of the Official IRA in connection with the events of Bloody Sunday in the city in January 1972.
The UK Secretary for Defence has said Britain is "indebted to those soldiers who served with courage and distinction to bring peace to Northern Ireland" after it was announced that one soldier would be prosecuted over the 1972 Bloody Sunday massacre.
The evidence was insufficient to charge 16 other former soldiers, Northern Ireland's Public Prosecution Service said on Thursday.
After its damning conclusion in 2010, David Cameron acknowledged that the actions taken by the British Army were unjustifiable and apologised.
Ciaran Shiels, a solicitor for a number of them, said they were "disappointed that not all of those responsible are to face trial".
Alan Barry, from the Justice for Northern Ireland Veterans campaign group, said he feared the paratroopers would face charges, accusing the justice system in Northern Ireland of being one-sided.
Mr Herron said the decisions in no way undermined the findings of Saville - that those shot were not posing a threat to the soldiers.
He said: "This is a remarkable achievement by the families and victims of Bloody Sunday". One injured man died four months later. "We recognize the deep disappointment felt by many of those we met with today".
He said the NI PPS had undertaken its statutory responsibility in relation to the case "with absolute integrity and impartiality, without fear or favour".
The complex investigation files included 668 witness statements, numerous physical exhibits such as photographs, video and audio recordings, and a total of 125,000 pages of material. Her brother was just 19 years old. I can still see his smiling face that day when he left home.
Families of the dead sought to right the wrongs of false claims that their loved ones had been armed.