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(Front L-R) French Prime Minister Manuel Valls, King Philippe of Belgium, European Union Commission president Jean-Claude Juncker, Queen Mathilde of Belgium and Belgian Prime Minister Charles Michel hold a minute of silence with all EU commissioners at the EU headquarters in Brussels on March 23, 2016, a day after blasts hit the Belgian capital. World leaders united in condemning the carnage in Brussels and vowed to combat terrorism, after Islamic State bombers killed around 35 people in a strike at the symbolic heart of the EU. / AFP / THIERRY CHARLIER (Photo credit should read THIERRY CHARLIER/AFP/Getty Images)

(Front L-R) French Prime Minister Manuel Valls, King Philippe of Belgium, European Union Commission president Jean-Claude Juncker, Queen Mathilde of Belgium and Belgian Prime Minister Charles Michel hold a minute of silence with all EU commissioners at the EU headquarters in Brussels on March 23, 2016, a day after blasts hit the Belgian capital.
World leaders united in condemning the carnage in Brussels and vowed to combat terrorism, after Islamic State bombers killed around 35 people in a strike at the symbolic heart of the EU. / AFP / THIERRY CHARLIER        (Photo credit should read THIERRY CHARLIER/AFP/Getty Images)