An immigration reform activist thinks the continued rampant violence in Mexico should serve as a stern warning to Americans that it's essential for the U.S. government to shut down the border. The U.W. State Department recently told American diplomats in the northern Mexican city of Monterrey to remove their children from the area due to growing threats of kidnappings and because of a shoot-out that took place in front of an American school there. Beginning September 10, the Department says the U.S. consulate general in Monterrey will become a "partially unaccompanied post," meaning diplomats and other government personnel stationed there...