The attacks in Brussels which killed more than 30 people and wounded 230 more have triggered security alerts across Europe. A major police hunt is underway a man seen on CCTV pushing a trolley through the airport with two other suspects. Other raids are also reported to be in progress in other parts of the Belgian capital. The attacks come just days after the mastermind of the Paris attacks in November was arrested in the suburb of Molenbeek. Professor Dave Sinardet is from the Free University of Brussels
