As the devastating war in the Middle East drags on, and occasionally makes its way into Europe, we wonder what drives the terrorists.
Is it politics? Economics? Or is it religion and the clash of civilisations? Because if we don't know what's driving the terrorists then how can we respond to it?
Carol Hunt, columnist with The Sunday Independent and a candidate for the Senate on the NUI panel.
Declan Power, security analyst
Roja Fazaeli, lecturer in Islamic Studies in Trinity College Dublin.
Julien Mercille, lecturer in the School of Geography, Planning and Environmental Policy at UCD.