Aftermath of terror blasts at Brussels airport, subway

March 23, 2016: A woman mourns for the victims of the bombings at the Place de la Bourse in the center of Brussels. (Fox News)

March 23, 2016: European Commission President Jean-Claude Juncker, front center, stands with front row, left to right, French Prime Minister Manuel Valls, Belgium's King Philippe, Belgium's Queen Mathilde and Belgian Prime Minister Charles Michel as well as members of the European Commission during a minute of silence at EU headquarters in Brussels. (Fox News)

March 23, 2016: A mourner places a candle for the victims of the bombings at the Place de la Bourse in the center of Brussels.<br> (Fox News)

March 23, 2016: People observe a minute of silence at the Place de la Bourse in the center of Brussels.<br> (Fox News)

March 23, 2016: Flowers and candles at the Place de la Bourse in the center of Brussels. (Fox News)

March 23, 2016: People bring flowers and candles to mourn at Place de la Bourse in the center of Brussels. (Fox News)

March 22, 2016: Police and rescue teams are pictured outside the metro station Maelbeek in Brussels. (AP)

March 22, 2016: Special operations police patrol after an explosion in Brussels, Belgium.<br> (AP)

March 22, 2016: Passengers walk inside the metro system after explosions in Brussels, Belgium.<br> (Evan Lamos via AP)

March 22, 2016: People are evacuated from Zaventem Airport in Brussels by bus after an explosion.<br> (AP)

March 22, 2016: A man carries a wounded person after an explosion at the Brussels Airport in Brussels, Belgium.<br> (Ketevan Kardava/ Georgian Public Broadcaster via AP)

March 22, 2016: Armed security personnel are seen in Brussels Airport in Brussels, Belgium.<br> (Ketevan Kardava/ Georgian Public Broadcaster via AP)

March 22, 2016: An unidentified traveler lies on the ground in a smoke filled terminal at Brussels Airport, in Brussels, after explosions. (Ralph Usbeck via AP)

March 22, 2016: An unidentified traveler runs in a smoke filled terminal at Brussels Airport, in Brussels, after explosions. (Ralph Usbeck via AP)

March 22, 2016: Hooded Belgian police officers patrol outside the Gare du Midi train station in Brussels.<br> (AP)

March 22, 2016: A man is wounded in Brussels Airport in Brussels, Belgium.<br> (Ketevan Kardava/ Georgian Public Broadcaster via AP)

March 23, 2016: Broken windows after the explosions at Zaventem airport near Brussels, Belgium. (Fox News)

March 22, 2016: People react outside Brussels airport after explosions rocked the facility in Brussels, Belgium.   (AP)

March 22, 2016: A man speaks on a mobile phone in Brussels Airport in Brussels, Belgium. (Ketevan Kardava/ Georgian Public Broadcaster via AP)

March 22, 2016: In this image taken from TV an injured person is evacuated as emergency services attend the scene after an explosion in a main metro station in Brussels. (AP)

March 22, 2016: Two women wounded in Brussels Airport in Brussels, Belgium, after explosions were heard. (Ketevan Kardava/ Georgian Public Broadcaster via AP)