Matt DeHart, a former American soldier who sought asylum in Canada claiming torture by U.S. agents probing Anonymous hackers and WikiLeaks, was taken from his Ontario prison cell Sunday morning and delivered to U.S. agents at the border. Mr. DeHart, 30, was allowed to make a quick phone call en route to his parents, who are living in Toronto facing their own removal order, said his father, Paul. “He was peaceful and in good health,” Paul DeHart said in an interview but the family remains deeply worried. “We are concerned about Matt’s safety as he transits,” he said. “We said...