FILE PHOTO: Belgian international airport of Zaventem airport, which is still not operating, is seen behind fences more than a week after the attacks in Brussels metro and the airport, in Zaventem, Belgium, April 1, 2016. REUTERS/Yves Herman
FILE PHOTO: Belgian international airport of Zaventem airport, which is still not operating, is seen behind fences more than a week after the attacks in Brussels metro and the airport, in Zaventem, Belgium, April 1, 2016. REUTERS/Yves Herman