TOPSHOT - Soldiers control passers by in Brussels, on March 23 2016, one day after the attacks on Brussels airport and at a metro station. 
About 20 people were killed on the metro and 14 at the airport in the rush-hour assaults, which came just days after the arrest in Brussels of the main fugitive suspect in November's gun and bomb rampage in Paris.  / AFP / BELGA / HATIM KAGHAT / Belgium OUT        (Photo credit should read HATIM KAGHAT/AFP/Getty Images)