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TOPSHOT - Passengers are evacuated from Brussels airport, on March 22, 2016 in Zaventem, after at least 13 people were killed and 35 injured as twin blasts rocked the main terminal of Brussels airport. / AFP / JOHN THYS (Photo credit should read JOHN THYS/AFP/Getty Images)

TOPSHOT - Passengers are evacuated from Brussels airport, on March 22, 2016 in Zaventem, after at least 13 people were killed and 35 injured as twin blasts rocked the main terminal of Brussels airport. / AFP / JOHN THYS        (Photo credit should read JOHN THYS/AFP/Getty Images)