A woman places a bouquet of flowers at Las Ramblas the day after a van crashed into pedestrians in Barcelona, Spain August 18, 2017. REUTERS/Sergio Perez
People march down Las Ramblas the day after a van crashed into pedestrians in Barcelona, Spain. Sergio Perez / Reuters.
A banner is held above the crowd as people observe a minute of silence in Placa de Catalunya, a day after a van crashed into pedestrians at Las Ramblas. Sergio Perez / Reuters.
People holding a Catalan flag gather for a minute of silence in memory of the terrorist attacks victims. Francisco Seco / AP Photo.
King Felipe of Spain and Prime Minister Mariano Rajoy observe a minute of silence in Placa de Catalunya, a day after a van crashed into pedestrians at Las Ramblas in Barcelona, Spain. Sergio Perez / Reuters.
King Felipe of Spain and Prime Minister Mariano Rajoy observe a minute of silence in Placa de Catalunya, a day after a van crashed into pedestrians at Las Ramblas in Barcelona, Spain. Sergio Perez / Reuters.
<p>A woman lays flowers in front of the Spanish embassy in Moscow, Russia, Friday, Aug. 18, 2017 for the victims of the Thursday's terrorist attacks in Spain. Catalonia's regional president says that there's at least one "terrorist still out there" after the attacks in Barcelona and a seaside resort. (AP Photo/Pavel Golovkin)</p>
<p>Pigeons fly over crowds gathered for a minute of silence in memory of the terrorist attacks victims in Las Ramblas, Barcelona, Spain, Friday, Aug. 18, 2017. Spanish police on Friday shot and killed five people carrying bomb belts who were connected to the Barcelona van attack that killed at least 13, as the manhunt intensified for the perpetrators of Europe's latest rampage claimed by the Islamic State group. (AP Photo/Francisco Seco)</p>
A girl holds a banner as people observe a minute of silence in Placa de Catalunya, a day after a van crashed into pedestrians at Las Ramblas in Barcelona, Spain August 18, 2017. REUTERS/Sergio Perez
A woman places a bouquet of flowers at Las Ramblas the day after a van crashed into pedestrians in Barcelona, Spain August 18, 2017. REUTERS/Sergio Perez
People march down Las Ramblas the day after a van crashed into pedestrians in Barcelona, Spain. Sergio Perez / Reuters.
A banner is held above the crowd as people observe a minute of silence in Placa de Catalunya, a day after a van crashed into pedestrians at Las Ramblas. Sergio Perez / Reuters.
People holding a Catalan flag gather for a minute of silence in memory of the terrorist attacks victims. Francisco Seco / AP Photo.
King Felipe of Spain and Prime Minister Mariano Rajoy observe a minute of silence in Placa de Catalunya, a day after a van crashed into pedestrians at Las Ramblas in Barcelona, Spain. Sergio Perez / Reuters.
King Felipe of Spain and Prime Minister Mariano Rajoy observe a minute of silence in Placa de Catalunya, a day after a van crashed into pedestrians at Las Ramblas in Barcelona, Spain. Sergio Perez / Reuters.
<p>A woman lays flowers in front of the Spanish embassy in Moscow, Russia, Friday, Aug. 18, 2017 for the victims of the Thursday's terrorist attacks in Spain. Catalonia's regional president says that there's at least one "terrorist still out there" after the attacks in Barcelona and a seaside resort. (AP Photo/Pavel Golovkin)</p>
<p>Pigeons fly over crowds gathered for a minute of silence in memory of the terrorist attacks victims in Las Ramblas, Barcelona, Spain, Friday, Aug. 18, 2017. Spanish police on Friday shot and killed five people carrying bomb belts who were connected to the Barcelona van attack that killed at least 13, as the manhunt intensified for the perpetrators of Europe's latest rampage claimed by the Islamic State group. (AP Photo/Francisco Seco)</p>
A girl holds a banner as people observe a minute of silence in Placa de Catalunya, a day after a van crashed into pedestrians at Las Ramblas in Barcelona, Spain August 18, 2017. REUTERS/Sergio Perez
A woman places a bouquet of flowers at Las Ramblas the day after a van crashed into pedestrians in Barcelona, Spain August 18, 2017. REUTERS/Sergio Perez
