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Gunmen gesture as they return to their car after the attack outside the offices of French satirical weekly newspaper Charlie Hebdo

Gunmen gesture as they return to their car after the attack outside the offices of French satirical weekly newspaper Charlie Hebdo (seen at rear) in this still image taken from amateur video shot in Paris January 7, 2015. Twelve people were slain, including two police officers, during last week's attack by Islamist militants Cherif and Said Kouachi. REUTERS/Reuters TV (FRANCE - Tags: CRIME LAW MEDIA TPX IMAGES OF THE DAY)

Paris shooting: Charlie Hebdo office attacked

Islamist militants stormed the offices of satirical newspaper Charlie Hebdo in Paris on January 7, 2015, and opened fire, killing 12 people in what French authorities are calling the worst terror attack in four decades. The masked gunmen shouted Islamist slogans and said they were avenging the Prophet. Among those killed were chief editor Stephane Charbonnier and household-name cartoonists such as Georges Wolinski and Jean Cabut. (Yahoo News/Reuters)

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