A French soldier patrols inside the Charles de Gaulle International Airport in Roissy, near Paris, France, yesterday. France has decided to deploy 1,600 additional police officers to bolster security at its borders and on public transport following the bomb attacks in Brussels. Authorities in Europe and the United States have tightened security at airports, on subways, at the borders and on city streets after deadly attacks Tuesday on the Brussels airport and its subway system.

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