The murky plot to send bombs - or facsimiles of them - from Yemen to synagogues in the United States offers a chilling reminder that the war on terror is never far from home. But politically, it couldn't come at a better time for the Harper government.

Canadian F-18 fighter jets escorted one of the cargo planes with a suspicious package through Canadian airspace en route to John F. Kennedy airport in New York on Friday, as part of Canada's shared responsibility for defending North American airspace under NORAD.

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