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OTTAWA, CANADA - OCTOBER 22: A police officer stands guard on Wellington St. in downtown, October 22, 2014 in Ottawa, Canada. Officials are investigating multiple reports of shootings and suspects after at least one gunman shot a Canadian soldier and then entered Canada's Parliament building. (Photo by Mike Carroccetto/Getty Images)
OTTAWA, CANADA - OCTOBER 22: A police officer stands guard on Wellington St. in downtown, October 22, 2014 in Ottawa, Canada. Officials are investigating multiple reports of shootings and suspects after at least one gunman shot a Canadian soldier and then entered Canada's Parliament building. (Photo by Mike Carroccetto/Getty Images)

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Witness: Ottawa gunman hijacked car

A witness who saw the suspected shooter during the attack on Ottawa's Parliament Hill speaks to CNN's Anderson Cooper.

Witness: Ottawa gunman hijacked car

A witness who saw the suspected shooter during the attack on Ottawa's Parliament Hill speaks to CNN's Anderson Cooper.