Six Lego-like concrete blocks mark the end of a rural road at the U.S.-Canada border. The police vehicle, revving through blowing snow, crunches to a stop. The barriers, installed last August in a joint venture with President Joe Biden's administration,

STORY: To stop vehicles bearing migrants from barreling across the Canadian border into the United States, blocks like these have been installed on rural roads that intersect the border.But Royal Canadian Mounted Police Sergeant Daniel Dubois explains they aren't a fail safe solution.

Canada has made its border increasingly secure. But enforcement is difficult on the world’s longest land border, and President-elect Donald Trump’s immigration rhetoric pressured Canada to invest in security or face tariffs.