Desperate world leaders today lined up to try to woo Russian President Vladimir Putin to back global efforts to defeat ISIS. For more than a year after relations with Moscow have been in the deep freeze over Russian incursions in Ukraine. But now Mr Putin is seen as holding the key to resolving the bloody civil war in Syria which has given rise to ISIS fanatics. It has led to the spectacle of US President Barack Obama, British PM David Cameron and Saudia Arabia's King Salman bin Abdulaziz Al Saud posing for photos with the Russian President.