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Queen Mathilde of Belgium meets policemen during the inauguration of a steel memorial at the heart of the European Union institutions based in Brussels as the country marks the first anniversary of the twin Brussels attacks by Islamic extremists on March 22, 2017. Belgium marks the first anniversary of the Islamic State bombings in Brussels, one at the airport and the other in the metro, in which 32 people were killed and more than 320 wounded with ceremonies showing that the heart of Europe stands defiant. / AFP PHOTO / POOL / Didier Lebrun (Photo credit should read DIDIER LEBRUN/AFP/Getty Images)

Queen Mathilde of Belgium meets policemen during the inauguration of a steel memorial at the heart of the European Union institutions based in Brussels as the country marks the first anniversary of the twin Brussels attacks by Islamic extremists on March 22, 2017.
Belgium marks the first anniversary of the Islamic State bombings in Brussels, one at the airport and the other in the metro, in which 32 people were killed and more than 320 wounded with ceremonies showing that the heart of Europe stands defiant. / AFP PHOTO / POOL / Didier Lebrun        (Photo credit should read DIDIER LEBRUN/AFP/Getty Images)

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(From L) Brussels region Minister-President Rudi Vervoort, Vice-Prime Minister and Foreign Minister Didier Reynders, Vice-Prime Minister and Interior Minister Jan Jambon, Belgian Prime Minister Charles Michel, Chamber chairman N-VA's Siegfried Bracke, Queen Mathilde of Belgium, King Philippe of Belgium, and European Parliament President Antonio Tajani attend the inauguration of a steel memorial at the heart of the European Union institutions based in Brussels as the country marks the first anniversary of the twin Brussels attacks by Islamic extremists on March 22, 2017. Belgium marks the first anniversary of the Islamic State bombings in Brussels, one at the airport and the other in the metro, in which 32 people were killed and more than 320 wounded with ceremonies showing that the heart of Europe stands defiant. / AFP PHOTO / POOL / Didier Lebrun (Photo credit should read DIDIER LEBRUN/AFP/Getty Images)

(From L) Brussels region Minister-President Rudi Vervoort, Vice-Prime Minister and Foreign Minister Didier Reynders, Vice-Prime Minister and Interior Minister Jan Jambon, Belgian Prime Minister Charles Michel, Chamber chairman N-VA's Siegfried Bracke, Queen Mathilde of Belgium, King Philippe of Belgium, and European Parliament President Antonio Tajani attend the inauguration of a steel memorial at the heart of the European Union institutions based in Brussels as the country marks the first anniversary of the twin Brussels attacks by Islamic extremists on March 22, 2017.
Belgium marks the first anniversary of the Islamic State bombings in Brussels, one at the airport and the other in the metro, in which 32 people were killed and more than 320 wounded with ceremonies showing that the heart of Europe stands defiant. / AFP PHOTO / POOL / Didier Lebrun        (Photo credit should read DIDIER LEBRUN/AFP/Getty Images)

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Queen Mathilde of Belgium attends the inauguration of a steel memorial by Belgian sculptor Jean-Henri Compere at the heart of the European Union institutions based in Brussels as the country marks the first anniversary of the twin Brussels attacks by Islamic extremists on March 22, 2017. A year on from the attacks led by an Islamic State cell that was also responsible for the November 2015 Paris attacks, Belgium remains on high alert with troops patrolling the streets and warnings of fresh risks. / AFP PHOTO / POOL / Didier Lebrun / Belgium OUT (Photo credit should read DIDIER LEBRUN/AFP/Getty Images)

Queen Mathilde of Belgium attends the inauguration of a steel memorial by Belgian sculptor Jean-Henri Compere at the heart of the European Union institutions based in Brussels as the country marks the first anniversary of the twin Brussels attacks by Islamic extremists on March 22, 2017.

A year on from the attacks led by an Islamic State cell that was also responsible for the November 2015 Paris attacks, Belgium remains on high alert with troops patrolling the streets and warnings of fresh risks. / AFP PHOTO / POOL / Didier Lebrun / Belgium OUT        (Photo credit should read DIDIER LEBRUN/AFP/Getty Images)

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King Philippe of Belgium (L) and Queen Mathilde of Belgium (2ndL) meet victims and relatives during the inauguration of a steel memorial at the heart of the European Union institutions based in Brussels as the country marks the first anniversary of the twin Brussels attacks by Islamic extremists on March 22, 2017. Belgium marks the first anniversary of the Islamic State bombings in Brussels, one at the airport and the other in the metro, in which 32 people were killed and more than 320 wounded with ceremonies showing that the heart of Europe stands defiant. / AFP PHOTO / POOL / Didier Lebrun (Photo credit should read DIDIER LEBRUN/AFP/Getty Images)

King Philippe of Belgium (L) and Queen Mathilde of Belgium (2ndL) meet victims and relatives during the inauguration of a steel memorial at the heart of the European Union institutions based in Brussels as the country marks the first anniversary of the twin Brussels attacks by Islamic extremists on March 22, 2017.
Belgium marks the first anniversary of the Islamic State bombings in Brussels, one at the airport and the other in the metro, in which 32 people were killed and more than 320 wounded with ceremonies showing that the heart of Europe stands defiant. / AFP PHOTO / POOL / Didier Lebrun        (Photo credit should read DIDIER LEBRUN/AFP/Getty Images)

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Queen Mathilde of Belgium attends the inauguration of a steel memorial at the heart of the European Union institutions based in Brussels as the country marks the first anniversary of the twin Brussels attacks by Islamic extremists on March 22, 2017. Belgium marks the first anniversary of the Islamic State bombings in Brussels, one at the airport and the other in the metro, in which 32 people were killed and more than 320 wounded with ceremonies showing that the heart of Europe stands defiant. / AFP PHOTO / POOL / Didier Lebrun (Photo credit should read DIDIER LEBRUN/AFP/Getty Images)

Queen Mathilde of Belgium attends the inauguration of a steel memorial at the heart of the European Union institutions based in Brussels as the country marks the first anniversary of the twin Brussels attacks by Islamic extremists on March 22, 2017.
Belgium marks the first anniversary of the Islamic State bombings in Brussels, one at the airport and the other in the metro, in which 32 people were killed and more than 320 wounded with ceremonies showing that the heart of Europe stands defiant. / AFP PHOTO / POOL / Didier Lebrun        (Photo credit should read DIDIER LEBRUN/AFP/Getty Images)