Canada's Arctic sovereignty and security “under challenge”: Navy commander

A rapidly-changing geopolitical landscape has put sharp focus on Canada’s Arctic security.

Vice-Admiral Angus Topshee, the commander of the Royal Canadian Navy, is warning Canada's Arctic sovereignty and security are "under challenge" amid U.S. President Donald Trump's calls for Canada to increase its defence spending.

Nathaniel Dove reports on Canada's efforts to re-arm its Arctic territory and what countries might help Canada.