(BBC News) One of the men who carried out the devastating bomb attacks in Brussels once worked as a cleaner at the European Parliament, officials say.
He had month-long summer jobs there in 2009 and 2010, the EU Parliament said, without revealing his identity.
Sources, however, say he is Najim Laachraoui, one of the airport bombers.
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The Belgian prime minister has defended his country's approach to fighting terror threats, insisting Belgium is not a "failed state".