At least 30 people have been killed with many injured in coordinated attacks in Brussels with bomb attacks on the city’s airport and metro.
Two bombs went off at Brussels airport shortly before 7am Irish Time near two check-in desks in the departure hall of Zaventam International airport.
Another bomb went off at around 08:11 Irish Time at Maelbeek metro station in the heart of Brussels' European quarter, close to the European Union buildings.
We look at the background to the attacks and why Europe faces a security threat.
We're joined by Declan Power, Security and defence analyst, Duncan Bullivant, Security analyst and CEO of Henderson Risk and Dr. Umar Al-Qadri - Head Imam of the Islamic Centre in Ireland.
Listen back here: