Iceland has spent decades without an army, navy or air force, relying on NATO and the United States for its defence. But growing Russian submarine activity in the North Atlantic is fuelling an extraordinary security debate. NATO jets currently police Icelandic skies as allied forces guard crucial sea routes around the strategically placed island. Now, the Guardians of Iceland are proposing a 2,000-strong standing force, 2,000 reservists and wartime mobilisation of up to 40,000 people. Could fears of Putin finally end Iceland's decades-old experiment of remaining without an army?