Martijn As requested by @eric, what is happening in the Netherlands: More police presence on major transit points: Amsterdam Central Station, Utrecht Central Station. International trains heading for Belgium and France have been cancelled completely. Border stations (e.g. Arnhem) have extra police patrols and customs is keeping n extra strict watch on who comes in by train. Schiphol Airport has upped security and is trying to cope with rerouted flights (planes that were supposed to land in Brussels). Around parliament in The Hague the guards now stand with visible automatic weapons in hand.