Vladimir Putin is making a sport of lashing out at President Obama, again taunting him about the Edward Snowden fiasco while accusing his administration of lying about Syria — on the eve of what will be a contentious showdown in St. Petersburg. The Russian president ridiculed the Obama administration’s claim that Syrian rebels are not dominated by al Qaeda-linked terrorists. “They lie beautifully, of course,” Putin said in a wide-ranging interview just before he and Obama meet face to face at the G-20 summit. He called Secretary of State John Kerry’s testimony about the rebels before a Senate committee on...