Police have arrested nine people and revoked the license of a livestock market owner in a case involving pork tainted with a chemical that made 70 people sick in southern China's biggest city, an official said Tuesday.
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Steve Kroft reports on why our roads, bridges, airports and rail are outdated and need to be fixed
Brown was unarmed when he was shot and killed by Ferguson police officer Darren Wilson on Aug. 9, setting off protests and debate
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