An elite police officer arrivesoutside the Bataclan theater in Paris, France, Wednesday, Nov. 13, 2015. Several dozen people were killed in a series of unprecedented attacks around Paris on Friday, French President Francois Hollande said, announcing that he was closing the country's borders and declaring a state of emergency. (AP Photo/Kamil Zihnioglu)
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ISIS claims responsibility for Paris attacks
French President Francois Hollande calls the Paris terror attacks "an act of war." Experts weigh in on the fight against ISIS.
03:17 - Source: CNN
Paris attacks 19 videos
An elite police officer arrivesoutside the Bataclan theater in Paris, France, Wednesday, Nov. 13, 2015. Several dozen people were killed in a series of unprecedented attacks around Paris on Friday, French President Francois Hollande said, announcing that he was closing the country's borders and declaring a state of emergency. (AP Photo/Kamil Zihnioglu)
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ISIS claims responsibility for Paris attacks
03:17
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A bomb disposal police officer (R)checks a car in a sealed off area on the Champs-Elysees avenue in Paris, on June 19, 2017 after a car crashed into a police van before bursting into flames, with the driver being armed, probe sources said. A source close to the investigation said the driver was "seriously injured". / AFP PHOTO / Thomas SAMSON (Photo credit should read THOMAS SAMSON/AFP/Getty Images)
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Armed man rams car into police van in Paris
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Car rams police truck on iconic Paris street
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Kashmiri demonstrators hold up a flag of the Islamic State of Iraq and the Levant (ISIL) during a demonstration against Israeli military operations in Gaza, in downtown Srinagar on July 18, 2014. The death toll in Gaza hit 265 as Israel pressed a ground offensive on the 11th day of an assault aimed at stamping out rocket fire, medics said. AFP PHOTO/Tauseef MUSTAFA (Photo credit should read TAUSEEF MUSTAFA/AFP/Getty Images)
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The anatomy of a terror attack
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Fingerprint of Paris terror suspect found in Brussels
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New images show fugitive Paris attack suspect
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Foued Mohammed-Aggad Paris Terror Suspect
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New Paris terror attacker identified
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A look at how ISIS uses encrypted communications
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PARIS, FRANCE - NOVEMBER 13: Policemen patrol the streets during gunfire near the Bataclan concert hall on November 13, 2015 in Paris, France. Gunfire and explosions in multiple locations erupted in the French capital with early casualty reports indicating at least 60 dead. (Photo by Antoine Antoniol/Getty Images)
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Paris attacks in 1 minute
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French hero has life-changing year
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French father explains terror attacks to his young son
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Paris mourns for the dead
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Police are seen near the Cafe La Belle Equipe at the Rue de Charonne in Paris on November 14, 2015, following a series of coordinated attacks in and around Paris late Friday which left more than 120 people dead. AFP PHOTO / LOIC VENANCE (Photo credit should read LOIC VENANCE/AFP/Getty Images)
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ISIS claims responsibility for Paris attacks
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Explosion heard at Paris soccer game
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Concert hall 'a bloody mess' after terror attack
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Witness describes his escape from Paris attack
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Police storm Paris concert hall
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Hear gunfire outside Bataclan Theatre
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Chilling details about attack in Paris theater
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