A Belgian serviceman stands guard as a train arrives at the Maelbeek - Maalbeek metro station on its re-opening day on April 25, 2016 in Brussels, after being closed since the 22 March attacks in the Belgian capital. Maelbeek - Maalbeek metro station was hit by one of the three Islamic State suicide bombers who struck Brussels airport and metro on March 22, killing 32 people and injuring hundreds. / AFP / BELGA / THIERRY ROGE (Photo credit should read THIERRY ROGE/AFP/Getty Images)