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A French gendarme enforcing the Vigipirate plan, France's national security alert system, patrols on November 19, 2015 in a railway station Paris. France revealed on November 19 it will spend an extra 600 million euros (USD 641 million) next year to ramp up security after the Paris attacks. President Francois Hollande announced this week that France is freezing plans to cut troop numbers through 2019. At the same time, the country will add 8,500 law enforcement jobs including 5,000 new police. AFP PHOTO / THOMAS SAMSON        (Photo credit should read THOMAS SAMSON/AFP/Getty Images)
A French gendarme enforcing the Vigipirate plan, France's national security alert system, patrols on November 19, 2015 in a railway station Paris. France revealed on November 19 it will spend an extra 600 million euros (USD 641 million) next year to ramp up security after the Paris attacks. President Francois Hollande announced this week that France is freezing plans to cut troop numbers through 2019. At the same time, the country will add 8,500 law enforcement jobs including 5,000 new police. AFP PHOTO / THOMAS SAMSON        (Photo credit should read THOMAS SAMSON/AFP/Getty Images)

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France beefs up security measures

Counter terrorism expert Aaron Cohen discusses the careful planning that goes into Special Forces' operations.

France beefs up security measures

Counter terrorism expert Aaron Cohen discusses the careful planning that goes into Special Forces' operations.