At her first summit since Brexit vote, May vows to work closely with EU

By Noah Barkin and Elizabeth Piper BRUSSELS (Reuters) - Arriving at her first European Union summit, Prime Minister Theresa May promised that Britain would remain a strong partner to the EU after Brexit and called for unity in pressuring Russia for its "sickening atrocities" in Syria. May, who replaced David Cameron in July after Britons shocked the EU by voting to leave the bloc, was due to spell out her vision for Brexit at a dinner with her 27 counterparts on Thursday evening. "This is my fir