US Warns Russia On Military Build-Up In Syria, Amid Reports Of Russian Troops In Combat

The U.S. warned Moscow on Wednesday that the Russian military's increasing presence in Syria risked escalating the bitter conflict that has ravaged the Middle Eastern country for the past four years, killing hundreds of thousands of people and displacing millions. The warning came in a phone call from U.S. Secretary of State John Kerry to his Russian counterpart, Sergei Lavrov. It was the latest in a series of diplomatic engagements designed to underscore U.S. concerns about Russia's role in Syr...