Turkish security services brought their strong-arm tactics to Washington on Thursday, roughing up protesters, journalists and even D.C. police before a speech by President Recep Tayyip Erdogan. The event descended into chaos and violence outside the Brookings Institute near D.C.'s Dupont Circle after the president's security personnel confronted a small group of people gathered to protest Erdogan's visit. ... Turkish security then clashed with the D.C. cops, who refused to remove protesters from the premises.