Republicans took to the streets of Belfast on Sunday in a "March for Truth Rally".
Gerry Adams addressed the rally
It is part of a campaign calling on the British government to "acknowledge the truth" about collusion in loyalist murders during the Troubles.
Sinn Fein leader Gerry Adams said the campaign "sends a clear message to the British state that we are determined to pursue the truth".
He added: "We're determined to campaign even though it may take a long time."