Russia can ramp up its military presence in Syria “in hours” if need be, Vladimir Putin has said in an apparent warning to anyone considering taking advantage of his decision to withdraw forces from the country. Mr. Putin made the comments as he addressed more than 700 servicemen who have completed tours of duty in the Kremlin on Thursday afternoon. […] The comments are bound to fuel suspicions about the true nature of the Russian withdrawal in Western capitals. Despite declaring the mission over, Mr. Putin has previously made clear that substantial garrisons will remain in Syria at the Hmeymim...