Policemem stand guard near a security perimeter set in the Rue de la Loi near the Maalbeek subway station, in Brussels, on March 22, 2016, after an explosion killed at least 11 people, according to spokesman of Brussels' fire brigade
A string of explosions rocked Brussels airport and a city metro station on Tuesday, killing at least 13 people, according to media reports, as Belgium raised its terror threat to the maximum level. / AFP / PHILIPPE HUGUEN (Photo credit should read PHILIPPE HUGUEN/AFP/Getty Images)
BELGIUM-UNREST-BLAST
Belgian police officers take position on the Wetstraat (Rue de la Loi) after an explosion at the Maalbeek subway station in Brussels on March 22, 2016.
European countries vowed to defend democracy against terrorism after blasts at Brussels airport and in the EU's institutional heart left at least 26 dead and dozens injured. / AFP / Belga / HATIM KAGHAT / Belgium OUT (Photo credit should read HATIM KAGHAT/AFP/Getty Images)
SWEDEN-BELGIUM-AIRPORT-BLAST
Swedish policeman survey Arlanda airport, outside Stockholm, on March 22, 2016, after Brussels attacks. / AFP / TT NEWS AGENCY / Johan Nilsson/TT / Sweden OUT (Photo credit should read JOHAN NILSSON/TT/AFP/Getty Images)
BELGIUM-UNREST-BLAST
Belgian police officers and rescue workers gather on the Wetstraat (Rue de la Loi) which was evacuated after an explosion at the Maalbeek subway station in Brussels on March 22, 2016.
European countries vowed to defend democracy against terrorism after blasts at Brussels airport and in the EU's institutional heart left at least 26 dead and dozens injured. / AFP / Belga / LAURIE DIEFFEMBACQ / Belgium OUT (Photo credit should read LAURIE DIEFFEMBACQ/AFP/Getty Images)
FRANCE-BELGIUM-ATTACKS-SECURITY
French police officers stand guard outside the Gare du Nord train station in Paris on March 22, 2016, as security measures have been reinforced after at least 26 people were killed and dozens wounded in a series of attacks in Brussels, described as a strike on the very heart of Europe. The bombings at Brussels airport and a metro station in the city that is home to the European Union and NATO are the latest in a string of attacks on the continent since the Madrid train bombings in 2004. AFP PHOTO / LIONEL BONAVENTURE / AFP / LIONEL BONAVENTURE (Photo credit should read LIONEL BONAVENTURE/AFP/Getty Images)
BELGIUM-UNREST-BLAST
Rescue teams evacuate wounded people outside the Maalbeek metro station in Brussels on March 22, 2016 after a blast at this station located near the EU institutions.
Belgian firefighters said at least 26 people had died after "enormous" blasts rocked Brussels airport and a city metro station today, as Belgium raised its terror threat to the maximum level. / AFP / - (Photo credit should read -/AFP/Getty Images)
FRANCE-BELGIUM-ATTACKS-SECURITY
French police officers stand guard outside the Gare du Nord train station in Paris on March 22, 2016, as security measures have been reinforced after at least 26 people were killed and dozens wounded in a series of attacks in Brussels, described as a strike on the very heart of Europe. The bombings at Brussels airport and a metro station in the city that is home to the European Union and NATO are the latest in a string of attacks on the continent since the Madrid train bombings in 2004. AFP PHOTO / LIONEL BONAVENTURE / AFP / LIONEL BONAVENTURE (Photo credit should read LIONEL BONAVENTURE/AFP/Getty Images)
BELGIUM-UNREST-BLAST
Belgian police patrol the Warandepark (Parc de Bruxelles) near the Wetstraat (Rue de la Loi) which was evacuated after an explosion at the Maalbeek subway station in Brussels on March 22, 2016.
European countries vowed to defend democracy against terrorism after blasts at Brussels airport and in the EU's institutional heart left at least 26 dead and dozens injured. / AFP / Belga / Nicolas Maeterlinck / Belgium OUT (Photo credit should read NICOLAS MAETERLINCK/AFP/Getty Images)
BELGIUM-UNREST-BLAST-ATTACKS
A Belgian soldier stands guard outside the Maalbeek metro station in Brussels on March 22, 2016 after a blast at this station located near the EU institutions.
A series of apparently coordinated explosions ripped through Brussels airport and a city metro station Tuesday, killing at least 26 people in the latest attacks to target Europe. / AFP / Cédric SIMON (Photo credit should read CEDRIC SIMON/AFP/Getty Images)
BELGIUM-UNREST-BLAST-ATTACKS
Belgian police officers stand outside the Maalbeek metro station in Brussels on March 22, 2016 after a blast at this station located near the EU institutions.
A series of apparently coordinated explosions ripped through Brussels airport and a city metro station Tuesday, killing at least 26 people in the latest attacks to target Europe. / AFP / Cédric SIMON (Photo credit should read CEDRIC SIMON/AFP/Getty Images)
Brussels Airport And Metro Rocked By Explosions
BRUSSELS, BELGIUM - MARCH 22: Police stand guard as passengers are evacuated from Zaventem Bruxelles International Airport after a terrorist attack on March 22, 2016 in Brussels, Belgium. At least 28 people are thought to have been killed after Brussels airport and a Metro station were targeted by explosions. The attacks come just days after a key suspect in the Paris attacks, Salah Abdeslam, was captured in Brussels. (Photo by Sylvain Lefevre/Getty Images)
Brussels Airport And Metro Rocked By Explosions
BRUSSELS, BELGIUM - MARCH 22: Airport staff comfort each other as passengers are evacuated from Zaventem Bruxelles International Airport after a terrorist attack on March 22, 2016 in Brussels, Belgium. At least 28 people are though to have been killed after Brussels airport and a Metro station were targeted by explosions. The attacks come just days after a key suspect in the Paris attacks, Salah Abdeslam, was captured in Brussels. (Photo by Sylvain Lefevre/Getty Images)
Brussels Airport And Metro Rocked By Explosions
BRUSSELS, BELGIUM - MARCH 22: Police stand guard as passengers are evacuated from Zaventem Bruxelles International Airport after a terrorist attack on March 22, 2016 in Brussels, Belgium. At least 28 people are though to have been killed after Brussels airport and a Metro station were targeted by explosions. The attacks come just days after a key suspect in the Paris attacks, Salah Abdeslam, was captured in Brussels. (Photo by Sylvain Lefevre/Getty Images)
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BRUSSELS, BELGIUM - MARCH 22: Crew and passengers are evacuated from Zaventem Bruxelles International Airport after a terrorist attack on March 22, 2016 in Brussels, Belgium. At least 28 people are though to have been killed after Brussels airport was hit by two explosions whilst a Metro station was also targeted. The attacks come just days after a key suspect in the Paris attacks, Salah Abdeslam, was captured in Brussels. (Photo by Sylvain Lefevre/Getty Images)
Brussels Airport And Metro Rocked By Explosions
BRUSSELS, BELGIUM - MARCH 22: Crew and passengers are evacuated from Zaventem Bruxelles International Airport after a terrorist attack on March 22, 2016 in Brussels, Belgium. At least 28 people are though to have been killed after Brussels airport was hit by two explosions whilst a Metro station was also targeted. The attacks come just days after a key suspect in the Paris attacks, Salah Abdeslam, was captured in Brussels. (Photo by Sylvain Lefevre/Getty Images)
Brussels Airport And Metro Rocked By Explosions
BRUSSELS, BELGIUM - MARCH 22: A view of bomb damage as passengers are evacuated from Zaventem Bruxelles International Airport after a terrorist attack on March 22, 2016 in Brussels, Belgium. At least 13 people are though to have been killed after Brussels airport was hit by two explosions whilst a Metro station was also targeted. The attacks come just days after a key suspect in the Paris attacks, Salah Abdeslam, was captured in Brussels. (Photo by Sylvain Lefevre/Getty Images)
Brussels Airport And Metro Rocked By Explosions
BRUSSELS, BELGIUM - MARCH 22: Passengers are evacuated from Zaventem Bruxelles International Airport after a terrorist attack on March 22, 2016 in Brussels, Belgium. At least 13 people are though to have been killed after Brussels airport was hit by two explosions whilst a Metro station was also targeted. The attacks come just days after a key suspect in the Paris attacks, Salah Abdeslam, was captured in Brussels. (Photo by Sylvain Lefevre/Getty Images)
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BRUSSELS, BELGIUM - MARCH 22: Highway access to Zaventem Bruxelles International Airport is closed following a series of terrorist attacks on March 22, 2016 in Brussels, Belgium. At least 13 people are though to have been killed after Brussels airport was hit by two explosions whilst a Metro station was also targeted. The attacks come just days after a key suspect in the Paris attacks, Salah Abdeslam, was captured in Brussels. (Photo by Sylvain Lefevre/Getty Images)
