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French soldiers patrol in front of the Eiffel Tower on January 8, 2015 in Paris as the capital was placed under the highest alert status a day after heavily armed gunmen shouting Islamist slogans stormed French satirical newspaper Charlie Hebdo and shot dead at least 12 people in the deadliest attack in France in four decades. A  huge manhunt for two brothers suspected of massacring 12 people in an Islamist attack at a satirical French weekly zeroed in on a northern town Thursday after the discovery of one of the getaway cars. As thousands of police tightened their net, the country marked a rare national day of mourning for Wednesday's bloodbath at Charlie Hebdo magazine in Paris, the worst terrorist attack in France for half a century. AFP PHOTO / BERTRAND GUAY        (Photo credit should read BERTRAND GUAY/AFP/Getty Images)
French soldiers patrol in front of the Eiffel Tower on January 8, 2015 in Paris as the capital was placed under the highest alert status a day after heavily armed gunmen shouting Islamist slogans stormed French satirical newspaper Charlie Hebdo and shot dead at least 12 people in the deadliest attack in France in four decades. A  huge manhunt for two brothers suspected of massacring 12 people in an Islamist attack at a satirical French weekly zeroed in on a northern town Thursday after the discovery of one of the getaway cars. As thousands of police tightened their net, the country marked a rare national day of mourning for Wednesday's bloodbath at Charlie Hebdo magazine in Paris, the worst terrorist attack in France for half a century. AFP PHOTO / BERTRAND GUAY        (Photo credit should read BERTRAND GUAY/AFP/Getty Images)

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Extreme authority: France's 'state of emergency'

After the deadly attack in Nice, the French government is flexing its authority by extending a state of emergency. CNN's Will Ripley explains what that means.

Extreme authority: France's 'state of emergency'

After the deadly attack in Nice, the French government is flexing its authority by extending a state of emergency. CNN's Will Ripley explains what that means.