Brussels on lockdown

Belgian soldiers observe the platform of a Brussels’ metro station following the terror alert level being raised to 4/4, in Brussels, Belgium, on November 25, 2015.

An armed Belgian soldier keeps watch under the Belgian flag on a building following the terror alert level being raised to 4/4, in Brussels, Belgium on November 25, 2015.

A woman and child pass by police officers as they arrive for school in the center of Brussels on Wednesday, Nov. 25, 2015.

Police patrols near a school in Brussels on Wednesday, Nov. 25, 2015. Brussels is keeping its terror alert on highest level but schools and underground transport reopened today.

Children pass by police officers as they arrive for school in the center of Brussels on Wednesday, Nov. 25, 2015.

Belgian Army soldiers and Belgian police patrol a shopping street in the center of Brussels on Wednesday, Nov. 25, 2015.

An armed soldier stand guards as pupils go to school at the French lycee in Brussels on November 25, 2015.

Belgium soldiers patrol on an underground station after the service partially reopened in Brussels on November 25, 2015.

An armed soldier stands guard as pupils make their way to school after school reopened in Brussels on November 25, 2015.

Police patrol in front of St John Berchmans College as pupils leave school on November 25, 2015 in Brussels.

A police officer controls the luggage of two passengers in the entrance area of the Thalys trains in Midi station in Brussels, Belgium, on November 24, 2015.

A Belgian police officer guards the building of the European Commission in Brussels, Belgium, Tuesday, Nov. 24, 2015. Brussels is keeping its terror alert at the highest level.

A Belgian police officer guards the building of the European Commission in Brussels, Belgium, Tuesday, Nov. 24, 2015.

Traffic lines a street in Brussels, Belgium, Tuesday, Nov. 24, 2015. Brussels is keeping its terror alert at the highest level.

An armed soldier stands guard on Rue Du Midi on November 24, 2015 in Brussels, Belgium.

An armed soldier stands guard on Rue Du Midi on November 24, 2015 in Brussels, Belgium.

Soldiers patrol in the streets, in Brussels, on November 24, 2015 as the Belgian capital remains on the highest possible alert level.

Soldiers and police patrol on Grand Place, the city’s main square, in Brussels, Belgium, on November 23, 2015.

Soldiers patrol on Grand Place, the city’s main square, in Brussels, Belgium, on November 23, 2015.

A soldier patrols in an empty shopping galery as the Belgian capital remains on the highest possible alert level, in Brussels on November 23, 2015.

Belgian Army soldiers patrols in the center of Brussels on Monday, Nov. 23, 2015. The Belgian capital Brussels has entered its third day of lockdown, with schools and underground transport shut and more than 1,000 security personnel deployed across the country.

Belgian police on patrol in central Brussels at dusk on Monday, Nov. 23, 2015.

French police officers monitor the border between France and Belgium in Neuville-en-Ferrain, northern France, Monday, Nov. 23, 2015. Belgian police launched more raids in Brussels and beyond early Monday, detaining five more people as they continued their hunt for a fugitive suspect in the Paris attacks.

People shop in a nearly empty arcade in the center of Brussels on Monday, Nov. 23, 2015. The Belgian capital Brussels has entered its third day of lockdown, with schools and underground transport shut and more than 1,000 security personnel deployed across the country.

Soldiers stand guard in front of the central train station in Brussels on Nov. 22, 2015.

Belgian soldiers patrol on Nov. 22, 2015, along Rue Neuve, the busiest shopping street in Brussels, deserted because of the terrorism alert level being raised to the maximum.

A police officer and soldiers stand guard on Nov. 22, 2015, along a deserted Rue des Bouchers in Brussels, famous for its restaurants, after the terrorism alert level was raised to the maximum in the Belgian capital.

Belgian soldiers board a bus during a shift change on Nov. 22, 2015, on Rue Neuve, Brussels’ busiest shopping street, deserted after officials raised the terrorism alert level to the maximum in the Belgian capital.

A man takes a selfie in front of a military truck stationed on a street in Brussels on Nov. 22, 2015.

Police officers and soldiers patrol Brussels on Nov. 22, 2015, after the terror alert level in the Belgian capital was raised to the maximum.

A military truck is stationed on Grand Place in Brussels on Nov. 22, 2015, after the city’s terrorism alert level was raised to the maximum.

Police officers and soldiers patrol in Brussels after the terrorism alert level was raised to the maximum in the Belgian capital.

A police officer and a soldier watch over tourists in Brussels on Nov. 22, 2015, after the terrorism alert level was raised to the maximum in the Belgian capital.

A Belgian army vehicle is parked on the almost deserted square in front of the main train station in the center of Brussels on Nov. 22, 2015.

A Belgian soldier patrols on a main boulevard in Brussels on Nov. 22, 2015, after the Belgian capital was put on maximum alert for terrorism.

A view of the deserted square in front of the Atomium, one of Belgium’s landmarks, in Brussels on Nov. 22, 2015.

A Belgian soldier patrols in the main train station in the center of Brussels on Nov. 22, 2015.

Belgian soldiers patrol near deserted terraces in the center of Brussels on Nov. 22, 2015.

Tourists walk along a deserted street toward the main train station in the center of Brussels on Nov. 22, 2015.

Belgian soldiers patrol near Christmas huts in front of the old Brussels’ stock exchange on Nov. 22, 2015.

Belgian soldiers and police patrol near Christmas stalls in the center of Brussels on Nov. 22, 2015.

Police cars drive by the Belgian parliament in Brussels on Nov. 22, 2015.

Belgian troops patrol at the Royal Galleries of Saint-Hubert in Brussels on Nov. 22, 2015.

Tourists take pictures near a soldier patrolling the Grand Place in Brussels on Nov. 22, 2015.

Tourists pose for a picture in front of an armored vehicle on the Grand Place in Brussels on Nov. 22, 2015.

People walk past closed shops in Brussels on Nov. 22, 2015. All metro train stations in Brussels were closed, the city’s public transit network said after Belgium raised the capital’s terrorism alert to the highest level, warning of an “imminent threat”.

A Belgian police officer patrols a train station in Brussels on Nov. 21, 2015. The Belgian government said it had concrete evidence of a planned terrorist attack that would have employed weapons and explosives.

A man walks by a military vehicle in front of the old stock exchange in the center of Brussels on Nov. 21, 2015.

A man walks by shuttered shops on an otherwise busy shopping street Nov. 21, 2015, in Brussels.

A closed Metro station in Brussels on Nov. 21, 2015.

A Belgian soldier patrols an otherwise busy shopping street in Brussels on Nov. 21, 2015.

Women walk past a soldier patrolling outside a shopping center in Brussels on Nov. 21, 2015.

Belgian soldiers and police patrol in Brussels on Nov. 21, 2015.