BRUSSELS, BELGIUM - MARCH 23 : Security forces stand guard around the Zaventem Airport in Brussels, Belgium on March 23, 2016. (Photo by Dursun Aydemir/Anadolu Agency/Getty Images)
BRUSSELS, BELGIUM - MARCH 23 : Security forces stand guard around the Zaventem Airport in Brussels, Belgium on March 23, 2016. (Photo by Dursun Aydemir/Anadolu Agency/Getty Images)