The defence secretary says the government's commitment to NATO is "unshakeable". Speaking at the London Defence Conference, John Healey says Ukraine is fighting for the same freedoms that Europe fought for 80 years ago and that "the lesson of 80 years ago reminds us of the importance of alliances". Report by Brooksl. Like us on Facebook at http://www.facebook.com/itn and follow us on Twitter at http://twitter.com/itn