As the Ukraine crisis continues to escalate, NATO Secretary General, Jens Stoltenberg, finds himself in the thick of it - tasked with preventing a third world war.

Norway’s former prime minister gained international renown for his stoic response to the 2011 terror attacks. Described by NATO colleagues as the ‘Trump whisperer’, he is known for being cool, calm and collected under pressure. Does he have what it takes for this latest challenge?

Mark Coles profiles the longest serving NATO chief in a generation.

Producers: Sally Abrahams and Ellie House Editor: Damon Rose

Credits: Professor John J Mearsheimer, courtesy of King's College, Cambridge Politics department ‘No Harm’ by Smerz