With more than 500,000 people killed and at least half the population displaced, Syria's conflict is the most deadly of the 21st century. Russia's decision to join the war has broken the long military and political stalemate but it looks unlikely to deliver any of the core demands that spawned the original uprising against the Ba'athist regime.
With more than 500,000 people killed and at least half the population displaced, Syria's conflict is the most deadly of the 21st century. Russia's dec...
