A picture shows a Belgian flag layed next to candles as people gather to observe a minute of silence in memory of the victims of the Brussels airport and metro bombings, on the Place de la Bourse in central Brussels, on March 23, 2016, a day (AFP)
A picture shows a teddy bear layed next to candles as people gather to observe a minute of silence in memory of the victims of the Brussels airport and metro bombings, on the Place de la Bourse in central Brussels, on March 23, 2016 (AFP)
TOPSHOT - French Prime Minister Manuel Valls (C-L), Belgian Prime Minister Charles Michel (C) and European Commission President Jean-Claude Juncker (C-R) arrive to lay wreaths at the Maelbeek - Maalbeek subway station entrance in Brussels on March 23, 2016 (AFP)
People gather to observe a minute of silence in memory of the victims of the Brussels airport and metro bombings, on the Place de la Bourse in central Brussels, on March 23, 2016 (AFP)
A picture taken on shows people gathering to pay tribute to the victims, one day after the attack that killed 35 people and let more than 200 injured March 23, 2016 (AFP)
French Prime Minister Manuel Valls (3rd-R), Belgian Prime Minister Charles Michel (2nd-R) and European Commission President Jean-Claude Juncker (R) pay their respects after laying wreaths at the Maelbeek - Maalbeek subway station entrance in Brussels on March 23, 2016 (AFP)
A Filipino activist lights candles among flowers offered for victims of Brussels attacks beside a condolence sign in suburban Quezon city, north of Manila, Philippines to condemn the latest attacks Wednesday, March 23, 2016. (AP)
A picture shows a Belgian flag layed next to candles as people gather to observe a minute of silence in memory of the victims of the Brussels airport and metro bombings, on the Place de la Bourse in central Brussels, on March 23, 2016 (AFP)
A man reacts as people gather to observe a minute of silence in memory of the victims of the Brussels airport and metro bombings, on the Place de la Bourse in central Brussels, on March 23, 2016 (AFP)
A man lights a candle as people gather to observe a minute of silence in memory of the victims of the Brussels airport and metro bombings, on the Place de la Bourse in central Brussels, on March 23, 2016 (AFP)
Poland’s Prime Minister Beata Szydlo places flowers in Poland’s national white-and-red colors at the entrance of the Belgian Embassy in Warsaw, Poland, Wednesday, March 23, 2016, to honor the victims of terror attacks in Brussels. (AP)
People gather to observe a minute of silence in memory of the victims of the Brussels airport and metro bombings, on the Place de la Bourse in central Brussels, on March 23, 2016 (AFP)
A Filipino activist holds a bouquet of flowers during a candle lighting event for the Brussels attacks victims in suburban Quezon city, north of Manila, Philippines to condemn the latest attacks Wednesday, March 23, 2016 (AP)