President Donald Trump declared a state of emergency this year for the northern border for human smuggling and drug trafficking. While the nearly 4,000-mile border with Canada gets less attention than the high-volume southern border, the boundary presents its own set of challenges. The Washington Examiner visited the northern border to evaluate how security has changed under the new administration for the series Threats from Up North: Patrolling the U.S.-Canada Border. Part 3 is on the technology used to secure the border.

CHAMPLAIN, New York — Technology has largely taken the place of a physical wall on the U.S.-Canada border, where federal law enforcement officials depend on digital systems and electronic devices to multiply their presence.