People holding a Catalan flag gather 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)
People hold up a Catalan flag at a minute's silence in Barcelona for the terrorist attack victims in Las Ramblas, Barcelona. World leaders condemned the attack. Francisco Seco / AP Photo

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