SAN DIEGO — Dozens of truckers waved signs and American flags at a border crossing Thursday to protest a program that will allow up to 100 Mexican trucking companies to freely haul their cargo anywhere in the United States. The U.S. Transportation Department was expected to begin issuing operating permits in the pilot program as early as Thursday. The Teamsters union, Sierra Club and nonprofit group Public Citizen sued to try to stop the program, arguing that there won't be enough oversight of the drivers coming into the U.S. from Mexico and public safety would be endangered. A federal appeals...