A 60-year-old man and a 78-year-old woman are to be charged over a security breach at Shannon Airport in the Republic of Ireland.
Belfast IRA woman Mairead Farrell's brother Niall Farrell and Margaretta D'Arcy were arrested over a runway protest last October.
The pair, activists with the Galway Alliance Against War, said they have been told that a summons will be issued at a future date.
The Shannon protest was held to mark the 11th anniversary of the US and British military operations in Afghanistan and to highlight opposition to US drone strikes in Pakistan.
"Our protest was part of an international week of action to oppose killer drones, which along with other deadly weaponry and troops are transported daily through Shannon's war port," Mr Farrell said.
"Prosecuting us will not silence us, it will not prevent us from raising our voices in protesting against the death of Irish neutrality and this craven government's role in the imperial wars of the 21st century."
A garda investigation was launched after two people carrying anti-war banners and placards breached a perimeter security fence on October 7 2012.
Shannon has been used as a transit route for the US war effort in Afghanistan.
Mr Farrell's sister was shot dead by the SAS in Gibraltar in 1988.