SALTILLO, Mexico -- More than 2,000 migrants boarded dozens of buses provided by the Mexican State of Coahuila en route to the border city of Piedras Negras, where a shelter with federal resources awaits them. The caravan will arrive at the border on Monday, a day ahead of President Trump’s State of the Union speech – and on the heels of the Pentagon’s announcement that nearly 4,000 troops will be deployed to the region in the coming weeks. (snip) ...Health officials here confirm that there are many respiratory infections, gastrointestinal conditions, five cases of chicken pox, one individual with HIV...