With Nato-Russian relations under strain, pressure is on the military alliance to act decisively. Has it been given a new lease of life? The FT's Frederick Studemann asks Michael Clarke, director of RUSI, and FT defence and security editor Sam Jones.<br /><br />For more video content from the Financial Times, visit http://www.FT.com/video<br /><br />Subscribe to the Financial Times on YouTube; http://goo.gl/vUQx5k<br />Twitter https://twitter.com/ftvideo<br />Facebook https://www.facebook.com/financialtimes