Turmoil in the Middle East has created a security and migration crisis which threatens the security of Europe and the wider world. Syria's war is at the heart of the problem, but so too is Libya's prolonged descent into chaos. Stephen Sackur talks to Aref Ali Nayed, Libyan ambassador to the United Arab Emirates and a senior diplomat involved in efforts to end the post-Gaddafi internal conflict. Can Libya's warring parties join forces to save the country?