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Police dogs search cars in a parking lot at Bishop International Airport, Wednesday morning, June 21, 2017, in Flint, Mich. Officials evacuated the airport Wednesday, where a witness said he saw an officer bleeding from his neck and a knife nearby on the ground. Authorities say the injured officer's condition is improving. (Jake May/The Flint Journal-MLive.com via AP)
Police dogs search cars in a parking lot at Bishop International Airport, Wednesday morning, June 21, 2017, in Flint, Mich. Officials evacuated the airport Wednesday, where a witness said he saw an officer bleeding from his neck and a knife nearby on the ground. Authorities say the injured officer's condition is improving. (Jake May/The Flint Journal-MLive.com via AP)

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    Michigan officer stabbing possibly terrorism

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Michigan officer stabbing possibly terrorism

The stabbing of a police officer at Bishop International Airport in Michigan is being investigated as possible terrorism. CNN's Rene Marsh reports.

Michigan officer stabbing possibly terrorism

The stabbing of a police officer at Bishop International Airport in Michigan is being investigated as possible terrorism. CNN's Rene Marsh reports.