Canada Set to Strengthen National Terror Defense Tactics
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A police officer holds up a length of police tape for pedestrians leaving the downtown area following shooting incidents in Ottawa.
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The Conservative Party caucus room is seen shortly after shooting began on Parliament Hill in Ottawa in this image taken and provided by MP Nina Grewal.
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Armed RCMP officers approach Parliament Hill following a shooting incident.
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Armed RCMP officers head towards the Langevin Block on Parliament Hill following a shooting incident in Ottawa.