BARACK Obama's Irish-American anti-terrorism right-hand man will visit Dublin later this week to give his insight into 'security cooperation' between the US and Europe.
John Brennan (57) is considered to be the US President's most trusted adviser and his "go-to person" in times of crisis.
He was photographed alongside President Obama in the iconic White House Situation Room as Obama's national security team watched the raid that killed Osama bin Laden.
And next Friday, high-level security measures will be in force in North Great Georges Street in Dublin as Mr Brennan jets in to discuss the US's link with the EU.
He will address the Institute of International and European Affairs to outline transnational security challenges and the international cooperation required to deal with them.
Tens of thousands of uniformed American soldiers currently pass through Shannon Airport annually and Ireland is a strategic hub for the US.
Mr Brennan's parents are both from Co Roscommon and he regularly visits as he still has family located there.