EU member states have agreed to extend tough economic sanctions against Russia until next year, as the Ukraine conflict drags on with no sign of resolution.  Indeed, some fear this new cold war could escalate into a nuclear war.  What’s behind this conflict?  And how might it be resolved? Also in this edition of Between the Lines, another in Tom Switzer’s occasional series reflecting on the wisdom of decisions taken at pivotal moments in our history.  This time, Tom considers whether the US decision to withdraw its troops from Iraq four years ago allowed Islamic State terrorism to flourish there?