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brazil security isis threat walsh pkg_00005106

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    Brazil bolsters security after ISIS threat

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Brazil bolsters security after ISIS threat

Weeks away from the Olympic Games, Rio is bolstering its security with drills for Brazilian special forces. CNN's Nick Paton Walsh reports.

Brazil bolsters security after ISIS threat

Weeks away from the Olympic Games, Rio is bolstering its security with drills for Brazilian special forces. CNN's Nick Paton Walsh reports.