Sen. Warner questions whether America should be a world ‘policeman' after US strikes Syria Fox News chief foreign correspondent Trey Yingst reports on U.S. strikes in Syria and escalating protests in Iran. Sen. Mark Warner, D-Va., gives analysis on ‘Fox News Sunday.’ NEW You can now listen to Fox News articles! Tensions between Syria’s transitional government and the Kurdish-led Syrian Democratic Forces (SDF) escalated this week after Turkey warned that Damascus could resort to military force