► Subscribe to the Financial Times on YouTube: http://bit.ly/FTimeSubs<br /><br />The deadly attacks in Paris have raised questions about security in Europe. The FT’s defence and security editor Sam Jones tells Daniel Garrahan that European intelligence agencies will struggle to keep up with the threat posed by Isis as it grows and evolves.<br /><br />For more video content from the Financial Times, visit http://www.FT.com/video<br /><br /><br />Twitter https://twitter.com/ftvideo<br />Facebook https://www.facebook.com/financialtimes