'A very dangerous thing': Vancouver Police Union slammed for mayoral endorsement

Police respond to an incident at Robson and Burrard streets in downtown Vancouver in this CTV News file image. Police respond to an incident at Robson and Burrard streets in downtown Vancouver in this CTV News file image.

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Exploring a tunnel deep below Niagara Falls

Turbines that once harnessed the powerful energy of Niagara Falls into a great source of electricity came to a halt years ago. But the secrets deep below the power station are coming to life once again. Visitors can now explore the former cathedral of power and a new tunnel that opens to a spectacular view of the falls.