BOYNUYOGUN REFUGEE CAMP, Turkey — Syrian troops combing through restive villages near the Turkish border set fire to homes and a bakery Sunday, cutting off a lifeline to thousands of uprooted people stranded in miserable open-air encampments.Activists said the military carried out mass arrests and threw up checkpoints in the village of Bdama and surrounding areas to block residents from fleeing across the frontier, as thousands of others have done.Read More... More on Bashar Assad