The BBC joined Canada’s military rangers on the final leg of a 5,200km (3,200 miles) Arctic patrol, where they shared the survival skills needed to endure freezing temperatures, navigate remote tundra and camp in conditions as cold as -60C (-76F).
But how did the journalists on the trail, Nadine Yousif and Eloise Alanna, get the story to begin with?
Video by Eloise Alanna
