A Mexican border town has "declared war" on the United States, vowing to clog the U.S. court system with illegal immigrants, because, city officials say, the U.S. Border Patrol is dumping in their town Mexican nationals caught crossing the border illegally. Officials from Agua Prieta, a Mexican city of about 130,000, are also claiming that the U.S. government has repeatedly neglected to inform them about new waves of immigrants before they are routed there from points in the U.S. after capture. Consequently, Agua Prieta leaders are teaching Mexican nationals how to cross into the U.S. and stay there, by instructing...